Not sure if this will help or not, I am not in the GTA...
I went to the local gunshop and asked what they had. Some of the guys that deal there collect AA/Rem hulls when at the range and bring them in.
I got a big bag of AAs amd some Feds for 5.00, still haven't finished sorting yet. Loaded up 50 of the AAs last night and there was a noticeable quality difference compared to the Bulk Pack Universals I was reloading the AAs are much better. They are stronger and keep thier shape (multiple reloads)
In short, ask at the gunshops or range you visit, they may be just sitting in the back collecting dust.
HTH
Cactus