My advise to you is not to use used tire for your own safety.
For your references, all the Canadian Tire, Costco, Walmart's tires are OEM.
On other hand, most car dealers and tire stores sale the original.
For the best quality/price ratio, Kumho Touring A/S 795 may be one of the top choice (http://www.tirerack.com/tires/tires...uring+A/S+795).
OK Tires (chain store) is one of the Kumho's official dealer and at least one of them is in east Ottawa as I checked the phone book recently.
Hope it will help a little.
