I do not know if you are interest in only a leather holster, but I have picked up a inside the waist band holster from
http://www.n82tactical.com that is the most comfortable inside the waist band holster I have ever used. I have one for the large auto, I bought another one for the small revolver, it works just as well for my Sig P232. I am sure they would have one that will fit the PK380, the suede back not only makes it comfortable it helps distribute the weight across your back. Hope this helps.