I currently have quite a few pre ban Beretta factory 15 rounders. Some are Italy made, USA made, and mil contract. I plan on adding a 92 mag carbine to the collection in the near future and was thinking about adding capacity. The only ones I’ve come across are Mecgar +2’s, however, they are listed as not fitting PB factory mags. Am I chasing a unicorn or does such a mystical beast exist for these mags?