Hey man, cigarplace.biz, famous-smoke.com and Holts all ship to Canada. If you order from them ask them to label it not cigars and whatnot.
If you're down for a little drive you should checkout Smokin Joes (the one on route 31). Its like 20 minutes from Niagara falls, in NY. I went there a few weeks ago and it is an awsome place. Its definately worth it.
Smokin Joes
2293 Saunders Settlement Rd
Sanborn, NY 14132-9336
(716) 297-0251