I tried to order some stuff from McMaster Carr today. Here is the reply I got:
Due to the complexity of U.S. Export regulations, McMaster-Carr only accepts orders from our established customers in Canada. We’re sorry we can’t help you.
So I phoned them because I don't really remember it being that "complex" to ship to Canada. What I was told was they are a "very conservative" company who does not like to do business with Canada! Wow, didn't see that coming. I hope the recession hits them hard!