IMAR Strataglass protective polish Here will help get the glass clean.
RAGGTOPP Fabric & Vinyl Convertible Top Cleaner for the top itself. The sunlight should kill a lot of the mildew but cleaning it out of the cloth will be rather difficult. Using the top cleaner with a brush and rising with a hose may yield better results.

I have monitored the temperature of an iron and kept it around 120F and had some luck. I have no "safe" number for leather. I have hit some with 250F with no issue and others turn into potato chips.

The moisture from steam seems to be the most dangerous game to play. I have had some leather that you could heat all day with no effect and hides that shrink like crazy. I have used hot water on part of a microfiber rag (to not burn myself) but that can also have negative effects.

I take a different approach with removing wrinkles in premade covers. I try to find a way to stretch the covers in the foam to remove the wrinkles. I tighten listing wire strips and add foam to areas that may help remove the wrinkle.

Use 1" foam around backrest (medium density). Cap the top with landau top foam 1" thick to make the curve on the top. Make cushion. Cut foam at height just below top of cushion. You can pattern the shape of the backrest and use snaps to secure like in the photo. If you wanted to make a neater finish you could go with a wood perimeter but you will need reinforcing and a complex amount of time and energy to figure the geometry.
That is going to be a very tight inside radius wrinkling will be a big issue. I have found shrinking the pattern and over exaggerating the curve to put tension on the apex is helpful.
These are difficult seats to make due to all the small inside radius. Trust the patterns.

I have been backing materials like that with muslin or a cotton duct. I have switched to 3m super 77 spray as they reformulated the mixture. I hate it but it works well for backing as you can lay the pattern out square and adjust it without causing large pulls. It stays tackey for a while. When it's all together a steamer will break the adhesion of the glue and let you make adjustments if needed. I only apply the glue to the backing.

The dealer should be able to source factory parts. I do not know of any aftermarket companies that make seat covers that new.

Hi Chris, I was just looking for a similar color for a Ford Bronco.
https://relicate.com/collections/houndstooth-seat-fabric/products/houndstooth-seat-fabric-baja-brown-tan
Relicate Houndstooth
Seems they might be slightly off in color.

Having a 64" wide bench that is at lest 10' long is very nice for headliners and other things where full rolls of material need to be laid out. My current bench is 70" wide and 15' long.

Three rivers supply

Albright Supply
usually stocks them.

Some modern leather seems to be treated so much some of it seems to be close to a vinyl product anyways.

Three Rivers Supply and Veteran Supply should be able to acquire Tan Stayfast Wireon and Binding.

Haartz company has had a supply shortage due do the factories being shut down to covid. Haartz topping across the board can be very difficult to find right now. Haartz does make the best topping materials available today.

The longer the pen is left on the material the harder it is to remove all of it.

Thank you! They seem to have a nice size range in 9 gauge.

What do you consider a reasonable rate? Some states are very strict on insurance and it can greatly vary from state to state.

I don’t want to be negative but I know a few people who have been trying to find that material for years. I would include myself on that list. I will ask around again and see if anyone has come up with anything.

Sounds silly but flip the material over and stitch it again to get the seam tighter. Also if you can twist the walking section of the foot on your machine you can get the welting closer to the needle. Sometimes running a smaller welting foot will work but be careful you do not stitch over the welting.

I have used Oak Bows in Chambersburg PA (717)-264-2602. They steam bend bows in what ever shape and size you want.
They will get the basic shape but you will have to fit them into the sockets.

I think a few shops are running Boss laser.
https://www.bosslaser.com/

The German Loop carpet may be a good substitute. The cost is about $75 a yard.

http://www.xkss.com/samples/import_carpet_german_loop.aspx

I worked at a BMW dealership and replaced a few of Z3 rear window sections. They are not fun. The dealer stopped offering the rear window replacement and would only sell a whole top due to how often the replacements failed or did not fit. The biggest issue was the zippers. That was 8 years ago.

What version of Kydex do you prefer to use and what thickness?
https://www.curbellplastics.com/Shop-Materials/All-Materials/KYDEX-Thermoplastic-Sheet
This is what I found on Kydex as i have never heard of it before.

My bench is 70"x12'. I also have a sewing mahcine on one end of it with an infeed table behind it. adding to the length making it about 22' in total length. The bench is large but I can fit an entire hide on it. It is also nice to be able to roll out a 60" roll of topping and not have one side hang off the edge. the bench started its life in a trim shop in the 1960's.

I find 1/2 scrim foam to be too thick to be using with a French seam. It leaves it looking puffy in my opinion. I usually use 1/4 or 3/8 scrim foam.

I commonly use the old bow pads to set the rear bow height. They should have gotten back to you with a proper bow height from Electron Top. Tacking the top on and making adjustments is the best thig you can do in the situation you are in.
I am not suprised you had 36 hours in fixing a tweaked top. When top arms break it is usually by force meanig multiple things have been bent and tweaked. Tops do not really "settle and bow" with out some sort of extreme force. The most important thing in a top frame is that everything is square and straight. Sometimes you will never get it to measure properly but it must operate properly with tension on the top.
I do not think 36 hours is an unacceptable number when it comes to fitting a top on a tweaked.