well there is a Food for Life brown rice tortilla and according to their website these stores carry their products so you can give them a try..
Vegetable Kingdom Organics 443 Adelaide St W 416 703-6447
Karma Food Co-op 739 Palmerston Ave. (416)-534-1470
The Health Shoppe 1375-A Yonge st (416) 968-1225
Big Carrot Natural Food Market 348 Danforth Avenue (416) 466-2129
Ambrosia Natural Foods 55 Doncaster Thornhill (905) 881-7811
Natural Food Emporium 3555 Don Mills Road North York (416) 497-2270
to name a few. the bottom 2 would be closest to you i would think.