Thanks to Celt, I found a wealth of information over at Rat.net. If you read through the posts you'll see that Triumph USA seems to have told it's dealers not to sell new Triumphs to Canadians. As for used bikes, the Recall Letter issue seems to be the sticking point....other than that, it does seem do-able.
http://www.triumphrat.net/rat-canada/284...mph+into+canada