If you can not get grain alcohol, denatured alcohol will work. You may need to dilute the alcohol with distilled water by 5%, since the collodion does require a bit of water.

Have you tried chemical supply houses? Having a visitor bring you a few bottles across the border?

For other options, ask at one of the collodion forums. Other Canadian Ether-heads might be of assistance:

http://www.collodion.com/forum/default.asp

http://www.cwreenactors.com/phorum/index.php