I think The
Confraternity of Saint James in the UK ships to Canada, and
Amazon will most probably do too. I also had good experiences with
Abebooks (who mediate for independent and international sellers) for "difficult" or secondhand publications, but I live in Holland, not Canada. Then again, Abebooks started out in Canada...
I used Pilgrim road to Nidaros by Raju for the links, but feel free to look for other guides.