Whoever made those also made them for the High Standard 22 mag derringer. They were a quality leather holster. I recall the problem with the one for the derringer was that you couldn't always get your finger to the trigger easily.
I'm sure you can get one of that design made but I wouldn't know from who, or whom, er whoever..
If you are not looking for a stiff leather pocket holster but rather one somewhat more flexible, Unkle Mike's of Oregon makes a ten or twelve dollar ballistic nylon holster for those small Berettas, one of which I prefer for my 21A and another for my 38 snubbie. HTH. Mikey.