It's for a Polish Wifama wz.78, a little .22 military trainer from the early 90s. There were only about 2,500 of them made, fewer imported, and almost no spare parts exist. There are SOME spare mags...they are in POLAND, and the guy who has them will NOT sell them to anybody from the USA, or who he thinks might sell them to somebody in the USA.
I fully expect it to cost a fair amount, but I would be able to recoup some of that cost by doing a mini production run and selling a few. It'd be a fairly simple piece to fab, three sheetmetal stampings, a couple of spot welds, and I've already sourced a spring that'll work. Just not enough demand for Tapco or Promag or Mecgar or even USA Mags to do a run, but enough for somebody to sell a few.