CANADA: where can i get dry ice?

hey there, there must be some canadian rodent breeders out there who use dry-ice to euthanize? i am just wondering if anybody knows where i can get dry ice from? i am in the vancouver, BC area of canada. thanks to anyone who replies!

I would try the following areas. Meat processors, bait shops, large supermarkets(the Safeway in my area carries it), meat storage lockers, and if fishing is big in your area, try the place that they bring the fish into. You could also ask the scirnce department of your local school where they get theirs, as many of them use it for classes.