What are you looking for exactly?
Actually, being in Mississauga your best bet is probably just to go to one of the Port Credit reptile expos

But you just missed the November one, and the next one isn't until February... don't know if you'd want to wait that long...
But let me know what you're looking for, and I might be able to point you in the right direction... I just moved back out west from Toronto earlier this month....