There is a good one this weekend in Kemptville, Ontario (close to Ottawa), lots of balls there, you just missed the best one, on Sept 10 ( Ptretty much the "Daytona of Canada") in Port Credit(Mississauga), there is another one on November 19 in Port Credit, which should also be a good one, Corey Woods and Mark Mandic (Markus Jayne) are always there, along with a whole bunch of ther respectable ball breeders....great shows, just like the ones you read about in the U.S.
Here is a link to the Ontario Expo's main site http://www.reptileexpo.ca/