Just Google the model you want and go from there. Guy it would be good to at least have the capacity to get yourself a 15 rounder or so. In terms of other appropriate manufacturers, I'd personally use Mec-Gar also. Must be no issue getting them. I'm on the lookout https://ruger-sr45-for-sale12344.blogrelation.com/38210798/facts-about-ruger-sr45-for-sale-revealed