I've been told to expect an increase soon, possibly 20%
I'm in New Zealand.

I also use a cheap siphon gun, once you get the air, glue and spray pattern dialed in properly it works great, until you drop it as mentioned by Naseem.

Same sorta thing here in Kiwi Land, wholesalers cutting back on stuff all the time, getting to the point where your gonna have to bring some supplies in from off shore yourself.

I usually lightly glue with a kind of dry spray to hold everything in place while i perimeter sew and add listing strips etc. the light dry spray lets go pretty quickly tho, so you don't want to leave it sitting round to long before sewing.
I also use calico or a light canvas for backing fluted etc.