There's a couple of anime shops at the second 
floor of the big blue mall south of Dundas and 
Spadina. Kiki Wai is there and they happen to 
sell a few cels. If you're interested, check out 
their website at:

http://www.kikiwai.com/

As for anime shops, I'd recommend checking out 
Silver Snail. The store's a little east of the 
Queen and Spadina intersection -- just a ten 
minute walk or so from the other store -- and 
they have a large selection of manga and toys.  

I hope you enjoy your stay in Toronto!