There were some made by BSA and a couple other British makers (can't remember the names of the others)for the public, so I would not doubt if Greener did the same. I am currently building a plains game rifle out of a sporterized one by Golden State Arms (they bought many of them in the 1950s and sporterized them to sell here in the US) My uncle gave it to me and after shooting it some I have come to really like the old 303 cartridge. I have heard they are still popular in Canada for Moose guns. Some people rebarrel them in 45-70. Keep us posted and if you could get some pictures I would be interested.