Here was my solution for my LCP. I used belt clips from Tandy that I got on sale a few months back (like Item #1239-00, but in black), and the pattern and holster has cuts for a belt as well so I can wear it as an OWB should I desire. It was made with 8-9oz and hand stitched, I wet formed and boned it using the pistol, I just dried the gun off and all was well.
I wear the clips over the pants and under the belt, if that makes sense. They are quite strong and I haven't had an issue with the holster pulling free when I've drawn the gun.
Hope this helps,
Chris