In the spring time there are large orders of c.h ball pythons that come into the county as babies, generally before their first shed.
As long as the animals are set up right and taken care of once they arrive in the U.S / Canada in your case they do great. They are not the disease ridden crap that some people think they are.
We buy anywhere from 700-2000 c.h balls a year, and they are shipped 8-10 per bag in wooden crates that generally house between 160-240 snakes per crate. As long as the babies are soaked to rehydrate when they arrive they will do great. In 07' we got 1300 in on a order and all but 15 were perfect and fed within a few weeks, and about half of the other 15 started with a little help.
If you look at the classifieds in the spring you will see plenty of dealers selling bags of babies.
Hope this helps.