Sorry to have gotten back at this one so late but you have to first identify whether the pistol was made in the US by Garcia Beretta or if it was made by Beretta of Italy. I believe they have different magazine release notch locations.
You can always try someone like Triple K for magazines and if that fails go directly to Beretta. Tell them your model, caliber and serial number and see if they can locate some for you. I had difficulties locating additional Mags for my 70S in 380, years ago, and Beretta was totally helpful and accurate in locating some. HTH. Mikey.
