Gonna have to do it the old fashioned way, like the rest of us.
For a 1911 here is what I do.
1. trace around the pistol onto so heavy paper.
2. draw the shape of the holster over the pistol outline.
3. cut out the paper pattern, use tape and carefully test fit it.
4. make any adjustments to the pattern that you need.
5. place the pattern on the rough side of the leather (make sure that you remember it is a mirror image this way).
6. trace the pattern, cut it out with razor knife, swivel knife or whatever you are using.
7. figure out your stitch lines on the front of the piece.
8. using Barge cement glue the pieces together, making sure not to get it on the surface.
9. cut the stitch holes using a sewing awl or dremel.
10. stitch it together, trim the edges and sand them flat.
11. round off the edges with a edge beveler.
12. punch your belt holes.
13. wet the holster with hot water, let it cool til normal color returns, insert the gun and hand mold it to shape (remove gun).
14. let dry 24 hours, dye and finish the edges.
email me if you need help. greg AT rangergunleather DOT com