These guys sell all sorts of fiberglass composite supplies, also a lot of plastics.
http://www.tapplastics.com/shop/product.php?pid=385&
I like the PTFE cutting boards. I’d love to have a big one for fabric cutting. I’ll have to price a big sheet of 1/8 thick poly plastic from my work. We order from Port Plastics.
And check this kevlar/carbon cloth… decent price too. I’ve not seen this weave pattern in hybrid cloth before.
http://www.tapplastics.com/shop/product.php?pid=96&
Their wet lay up rollers ( tools) are inexpensive also. Nope i’m not their sales guy lol