Yup. Not many people know about it. I got mine from Dick's Lumber in Burnaby. They carry the Dricon brand. I've held a match to this brand of wood and also put it over a gas stove and it doesn't catch on fire.
http://www.dricon.com/
I'll probably use the fireproof plywood only for the panel that the reflectors are attached to. I'll build the rest of the canopy with normal wood. What's everyone's favorite wood for canopies? Oak?