Here's a current ebay listing
http://cgi.ebay.ca/ws/eBayISAPI.dll?...E:B:SS:CA:1123
I have never dealt with this seller so I can't comment on them.
Also, you probably need to ask them when the tires were made as there's a huge difference in safety between new (never installed on a wheel but made in 1945) and new (made yesterday in a DOT certified plant). They don't seem to ship to Canada, but there's no harm in asking.