Why not try contacting Ellwood Epps in Orillia, Ontario? This is a wonderful old-style gunshop that carries an amazing assortment of relatively obscure ammo and other goodies, and if they don't have it in stock they will get it for you if possible. They do a lot of mail order business and are very fair and honest in their dealings. I make the 200-km roundtrip drive regularly and am rarely disappointed.

You may find it simpler to deal within Canuckistan rather than trying to import ammo from the U.S. or Europe. I tried that once and don't want to repeat the exercise.

John