There are a couple of military BSAs for sale on kijiji in Toronto right now.
http://ontario.kijiji.ca/c-cars-vehi...dIdZ242179172#
http://ontario.kijiji.ca/c-cars-vehi...AdIdZ242179622
Price is not cheap, but I suspect he would be open to offers. He has a couple more miltary bikes listed as well including a wartime Harley and a Norton.