Nothing at all stops you from ordering where you want. But if you bother to look at the costs by the time the stuff gets here, exchange rates, etc, you'll notice it's simpler to ask a Canadian Retailer.
So far I've gotten superb service from the retailers I dealt with.
If you still want to send your cash out, send it to me. You'll get the same results/risks; nothing in return and I'll buy some cold beer.