Many seedbanks will ship the seeds discreetly to Canada or just about anywhere else. Check out the the sites recommended above though. I'm sure they will hook you up. Take care and be safe.
Dr.Greenthumb is in Ontario,CA just outside of Ottawa I think. They also accept Visa,Masrecard and American Express over the phone and also they got some nice looking strains, Espicially "Chamuluma".