Ruger LC9 rear sights hang up when I draw from my appendix holster. Any Suggestions?

[Gunho]

I have a Ruger LC9 with a no name inside the waist band appendix holster that I bought cheap at a gun show. The Rear Sights keep hangining up on the piping that is sewn around the top edge when I draw the pistol out of the holster. Any recommendations for a better appendix holster or other options that will allow me to make a quicker draw without having to work the pistol around until it finally comes out? If I needed it in an emergency, I would probably be killed before I could get it drawn out.