Anybody know of some good canadian plastic suppliers?

I'm a little new to the vacuum forming, but of all the info I've collected, I've only got two more questions I haven't been able to find clear answers to, although I understand the first one is very subjective:

A: What kind of plastic do people generally find to be better for vacuum forming Mandalorian armor?
B: Does anybody know a good Canadian supplier for such products?

Any suggestions and answers for either question would be greatly appreciated. I've poured over dozens of threads, and I want to do this on my own steam, but I don't know the first thing about where to come by these materials.

Thanks in advance for anyone with the patience to help a newbie out.

Corran

the best plastic i think would be styrene but go to www.tk560.com and he has some great info on vaccum forming machines