Cayne's is decent for kitchen stuffs, as is Nikolau (like Nella, restaurant supply) at Queen/Bathurst. I don't even mind IKEA for some generic kitchen stuff, cookie sheets shouldn't be too tricksy unless you're looking for especially long life, my cheapo sheet and baking tins are lasting the rounds so far - I think the cookie sheet I got from the dollar store, in fact - nothing fancy like silicon or non-stick though, just regular metal.

Reminds me that I've not baked pie all summer, hell, hardly any baking so far. Hrmph.