I also have found 2 each PARKERIZED M3/M3A1 “Grease Gun” SMG mags, $20 each plus shipping. They’ll fit the MPA-45 pistols, .45 Encoms and semi-auto M.A.C. 10 in .45 ACP. Look to be in good shape.
PM me if interested.
It will attempt to get back to you soon but be patient please. Some health issues have priority.
Thanks for looking.