Beretta makes many of its own holster, iwb, owb, competition holsters, duty holsters, leather, kydex. They also sell Safari land which is the top military/police duty holster supplier in the USA
It really just depends on how you plan to carry, and what your carrying for.
Ccw go kydex always and most likely iwb, 3gun comp or range time competition holster is fun, owb or duty carry id go with safari land or at least something with good retention
berettausa.com/en-us/store/shooting-gear/holsters/concealed-carry-holsters/

Ruben, Alien Gear has some of the sturdiest and comfortable Holsters for the Beretta 92/M9. I would browse the style you want OWB/IWB here : https://aliengearholsters.com/beretta-92-full-size-also-fits-m9-shapeshift-iwb-holster.html

CHECK HERE ( craftholsters.com/beretta-m9a3-holsters ). They make SUPERB M9A3 holsters. A lot of choices too. I hope this helps!