I think this might be too late, but Downtown Camera on Queen near Henry's, as Jeff L suggested, has it on order. A couple of weeks ago I bought 4 rolls of their 35mm Ektar. I also called last week to ask if they had any 120 but they were sold out and I was told that they are on order.
As for Henry's, I called the Toronto supercentre location and they said that they did have 35mm of it but "never heard" of the 120 format. Weird :S