I managed t scoop the last of the Tonkin from the cambridge store and they claimed they were getting the exact same stuff in when re-stocking and even argued it was the same stuff when it came in. It definitely was useable but a far cry from high grade tonkin.
Hoping to get stuff randomly is still realistic but not if you're looking for quantity. It is easy to source seatstay and chainstay material of the best quality in the toronto area. I've accumulated a lot of that by just grabbing it whenever I see it.