You can try Vann's from the US. The have 6 locations in Montana, in addition to their large online side. Unfortunately, they dont ship to Canada, but Kalispell is only 4-5 hours away. Might be worth it for a huge ticket item.
http://www.vanns.com
The best Canadian retailers I have found are Complete-IT and AVDeals. AVDeals mostly deals with panels and projectors, and other hard core equipment. Complete-IT has all of that as well, but does have some receivers.
http://www.complete-it.ca
http://www.avdeals.ca