Lol...all trolling and fun aside...I found them. Ruger p90 extended mags.http://www.climags.com/ruger-magazine-p90-p97-45-acp-10-round-promag-mag/
Anyone here have a P90?
I actually load entire 1911s into my .460 brass for my plinking ammo. Not very accurate, but it goes bang every time, so I'd consider it an improvement.
I don't have any .45, but they held 11 .40 rounds, so that sounds right. There were some crazy looking Mini14 mags in the box. They don't use a spring. There is a metal strip that rolls up under the follower like a measuring tape.