I've been playing around with kydex lately to make my own for my Glock 19 w/the surefire X300 on it-I didn't like any of the production options and decided to get it a try. This is one of the early models that was still in fine tuning (you can see some pencil line on it for further sanding):
I've found that it isn't difficult to make
something but it can be time consuming to make something nice. Startup cost isn't too bad but it is worth getting the good foam, making a decent press, and having the stuff for rivets and the like all on hand. A fair amount of prep work and then a lot of finishing work too.
I also grabbed a plastic training G19 so that I wasn't pressing hot kydex against my actual pistol and then clamping down on it over and over, fairly cheap on ebay and since my intent was to make a variety of holsters I figured it was worth the investment.
r-
Ray