I had a Binks also that I really liked. I had a hard time finding an equally good spray gun when mine broke. I ended up finding the Binks 2100 at https://www.perfectfit.com/.

I see the 2001 all over Ebay -- though they're used.

The 2100 is a nice gun.

Harbor Freight! $ 18.00 for a gun that will last 5-8 years. I have a love hate relationship with Harbor Freight. Normally if you will use it 1 or 2 times a year, tools from HF will do the trick. If you need a daily driver spend the extra on something good. BUT when it comes to my glue gun, my HF junk will do just as good as any Binks for a fraction of the price. Besides when my HF gun gets too much glue caked up on it.. I toss it in the trash and grab another, not only saving time cleaning the gun but saving $ as well. you could buy a 1 Binks for $275 ish or 15 HF guns for the same price.
I mainly do production work now days, and I go through 5-8 gallons of glue per month. The HF guns hold up just fine.