like this one, and need a magazine, I received a message from a gentleman in Britain who has one:
I have a spare magazine for a BSA Sportsman 5. It is in perfect working order although the bluing is worn as we might expect. I am happy to sell it to anyone who wants it and I will ship it abroad if you cover my costs. Email me at: charleseshepherd at yahoo point co point uk, if you want to discuss it. I am in Birmingham, England: the home of BSA.
So if you're looking for one, might get hold of him.
Yes, the 'point' in the address is from me; you know what it means.