Good question. I'm not aware of anybody that stocks them in Canada. You can order them through most of the well-established dealers like P&D and Shooter's Choice.
Too bad that doesn't give you the opportunity to handle one before deciding if they're right for you. The other problem is that there's a minimum order threshold, so special orders can take months to come in, if you're one of the first to order.
On their site, Shooter's Choice does mention the possibility of having one or more in stock. Who knows, you might get lucky...
http://www.shooterschoice.com/kimber/kimshotguns.htm