I tried using a Desantis Nemesis size E1 to pocket carry my Shield, but since the rear sights weren't covered, I got a bit of road rash on my upper leg from the sights rubbing. I read where another forum member recommends a Sticky MD4.
A good paddle holster, that I've been using is a Comp-Tac.
Outside Waistband Holsters - products new home - Paddle Holster