Howdy. Try as I might, I can't find a source for SIG mag upgrades, etc now that SigPower has apparently flown the coop. SigPower Jeff was helpful and the upgraded components for my P229R 22lr mag was just what I needed. He had other items like shorter followers, slide rods, etc as well. I don't want much...an extra 22lr mag for the 229 that carries 15 rnds instead of 10, and has the stronger spring. IF someone happens to upgrade the 229 mags in 9mm, I'd certainly take a look, although the three mags I have now are working fine. Anybody know of a SIG mag guru out there? Thanks y'all !