Brownells can't ship you any AR upper without an export permit - that's the way it goes with international arms transactions (which is what you're talking about). Questar may be able to bring one in for you (provided you want an exportable one - no FH, or short barrel) but they have to get permits too - it's bureaucracy, and it's expensive. You may want to look into having one built in Canada, ATR could probably build you a better one at the same price as importing one. That way you won't get "raped" 3 or more times if you have an issue and it has to be worked on.