From my experiences and from books that I have read, saltpeter is Nitrates not Nitrites and should not be used in place of cure#1....... Cure #1 should be clearly marked 6.25% sodium nitrite.
Cure #1, Prague Powder #1, Insta-cure #1 should be readily available. Meat markets, sausage maker supplier's, all sell some form of Cure#1. Even Morton makes Tender Quick or Sugar Cure. I have seen all of the above in cooking stores, butcher shops, and even on E-Bay and Amazon. http://sausagemaker.com
in Buffalo, NY, and http://lemproducts.com
all ship to Canada. Also try http://stuffers.com
which is out of British Columbia, and http://www.canadacompound.com
out of Toronto..
Even Williams Sonoma, and Carrefour have it in a little jar near the spices.