QTC Gears will ship to Canada by USPS but it takes awhile for them to get something in the mail.
http://www.qtcgears.com/
I have an extra set of their catalogues if you want them.
I will be going to Blaine in mid-April if you can't get McMaster-Carr to ship to Canada. I can get it shipped to Blaine and pick it up there for you. PM if you want.
Richard