We have a winner!!
Printable View
IIRC, the HS2000 mag was designed around a Beretta 92 mag.
You'd have to cut the proper catch slot, but for a mechanic that likes to tinker, it should be cake.
Also, I believe the Beretta mags are a little bit longer, or have a shorter baseplate (been a few years since I compared them) so popping in mags too hard could damage the ejector. Could build up base plate, or make spacer.