DSA has South African pre-ban 15 round mags advertised as Beretta mags for 50 dollars, but they are actually for the Vektor Z88 (a near identical copy of the Beretta 92FS). I bought 2 and they fit my Beretta (though I haven't taken them to the range to test them). The two reasons I bought them were:
1. According to one article, they are exceptionally durable.
2. I plan on buying a Z88 and SP1 (which also uses Beretta 92 mags), and wanted some genuine pre-ban mags to go with them.
The mags are in like-new condition (possibly refinished, but no dings or pitting), and have a thicker baseplate on them (they don't fit into the Beretta's factory case). They also have the LIW (Afrikaner for Lyeltton Engineering Works) logo on them. And DSA advertises in Shotgun News.