I started making my own leather holsters about four years ago when it became almost impossible to get a quality holster in a decent time frame. As well I have a bunch of old alloy framed pistols that I like to carry and finding a maker that still made holsters for that model was difficult.
Check out www.leatherworker.net
. They have a dedicated holster subforum which is great. There are also a few tutorials on holster making that I used, one being www.jdlawhon.com/beltslide
There is a learning curve so the first one or two may look a bit rough but it gets easier quickly. Good luck.
best wishes- oldandslow