I found some being newly made, not quite like a Speeder but fantastically well made & slightly rounded bottom, cost a fair bit how ever !

I have a 8X50R Lee Speed Roy but its over seas right now & I need that mag, I did find a very rough one which I have panel beated & made a side clip for but again it has a job in a 375EX which I think has the same mag as the 8X50R ?