New unused P1 magazines will fit and are plentiful...At least they were when I bought mine, a year or two ago...Check GB...
BTW: Your pics at P38Forum will only show up
here to members of that forum...I'm a member but not signed in, and they don't show up for me...I have the same problem when I want to link a pic on this forum to other forums and the members there aren't members here...
Ah, John D. made an upgrade and passwords have been obliterated...No wonder I'm not logged in...
OK, I requested/changed/upgraded my password there, and logged in, and now your pics show up here...The first two are upside down, but wth...
Also, if I may inject a warning from my own personal experience, do not trust the 'de-cocking' lever...It may fire off a round...Make sure you have it aimed in a safe direction if you do use it...It'll save you the trouble of having to patch holes in doors...