PPK sort of. My FEG PA-63 is a modified PPK but has many parts that are interchangeable with the PPK. FEG use to be a licensed mfg for Walther. The PA-63 is a little on the long side for pocket carry, but still as you say a pocket carry pistol in the right pants.
My KelTec PF-9 can be pocket carried in a holster that is large enough to not print, while the PA-63 in a pocket holster will have the butt visible in some pants pockets from the right angle (but not my standard jeans).
What I like about the PA-63 is that it is chambered for a slightly more powerful cartridge than the .380 Auto or 9mm Short. Buffalo Bore Ammo makes some hot 9mm Mak that seems to feed well in the PA-63.
I've got a PPK/S that a friend gave me. There is something just really perfect about the PPK/S, it's one of the most iconic guns out there, along with the Single Action Army, 1911 and S&W revolvers in several sizes.