I found the Hickok45 video from 2011 on 'Legal Pocket Carry' and the holster he especially liked for his PM9 was by Alabama Holster Co. It's a hard shell with a hook to help keep it in pocket and a thumb push point to help unlock it from retention. Although they offer LH or RH fit for dozens of brands and most current S&W models, unfortunately I don't see CS9/40/45 in the mix. So, back to the drawing board.
Nemesis, maybe Galco, Mika's looks good too. I want to rotate my SIG P365 or CS9 and feel confident carrying either. Most of these pocket holsters are inexpensive enough I might try several to see what works best for me, but I welcome any other suggestions. Thanks!