I was once in a similar situation, lost a mag to an obsolete rifle that belonged to my father, so I called Numrich Gun Parts… they have almost anything.. they had what I needed and when I asked how much they literally asked what I was willing to pay for it… I can’t remember what that stunt cost me but I got the mag and gave the rifle back to my dad and told him I would use something else from now on, this was just some cheap .22 and I remember thinking I just paid more for a mag than the rifle was worth.