I have an Anschutz 17p, essentially an exemplar with the plastic stock in 17hmr. It has been on a shelf in my gun safe forever and a day. The plastic floor plate of the magazine was broken, rendering the magazine useless. I have no idea what caused that but I need a magazine. Is it correct that there is an aftermarket magazine that will work or can be made to work? Any help with my magazine dilemma would be greatly appreciated