It's done to prevent grey marketing and protect distribution channels and give brick and mortar shops a sort of level playing field against each other and big box retailers like backcountry/dogfunk, the house etc.
Your best bet is to just find something in the current catalog year you like because as hard as it is finding out a specific out of season item in The States, with the distribution contracts it will be even more difficult. The other option is to buy it used. Check geartrade, they are a dumping ground for backcountry/dogfunk and since they have an unlimited return policy, you'll often find stuff that is essentially brand new up there but they can't sell it as new. This gets around the contract requirements. I don't know, however, if they ship to Canada.