For a small pistol such as the LCP,P3AT,etc. Bulldog makes a very small clip on your belt/waistband cell phone style holster that works really,really well.
In fact when you buy the Taurus TCP 738 .380 it comes with this nifty holster as part of the package.
Fits my Diamondback 380 perfectly.
I have been walking around all sorts of people lately including LEO's that were none the wiser to what it contained inside it.
I showed it to our Security guard the other day and he ordered one from Cabela's that day for his LCP.