TexasCHLforum.com

two options come to mind.
You might look at a http://www.smartcarry.com/ it might be a good option, then you wouldn't have to worry about the holster slipping.

Also, my favorite holster for my LCP is a Kusiak Leather. it really doesn't weigh much of anything. You should be able to put it on your shorts with no problem, with whatever belt you normally use.

I think it would depend on what kind of pants you want to wear? do you want to wear those tight fitting legging style bike pants? or jeans or whatever?