Do they do cut to size plexiglass or polycarbonate?

Yes

Yes but I found that a piece I needed they didn't have a base size to cut it from. Prices have gone way up

Yes its isle 15

Yes including glass. If you want to cut the plexiglass or polycarbonate yourself, use a jig saw with a fine blade such as a 101 and a sanding block with 220 grit paper.

I believe so