I was finally able to purchase some new factory Ruger 15rd P-Series magazines for a couple of new to me P89's. Unfortunately, it was hard to rack the slide on one of them when I inserted one of these magazines. I did some research and found out the there are actually two different magazines for the P89 depending on the serial number with the serial number 304-70000 being the dividing line. Well, I now have Ruger magazines for the one that has a serial number greater than 304-70000, but I can't find Ruger magazines for the one that has a serial number below 304-70000. I would just use Mec-Gars, but the floor plate really cuts in to my hand. The Ruger part number for the factory Ruger 15rd magazines I need is 90234. Does anyone know where I can find them?