like munding said there are many canadian breeders that likely have the same snakes and i know many breeders prices are in line with US prices. To get cites snakes into canada from US there is about a 6 month wait for permits and will cost you an extra$300-400 bucks. on top of that if the breeder doesn't do it already you will likely not have a good experience at least if your going to do cross border deal with a large breeder that ships to canada.

also the snakes will have to be inspected by US Fish and Wildlife.