I saw some earlier threads on this subject but the only products mentioned were Hogue which doesn't have what I'm looking for.

I own an Interarms Walther PPK/S that I am dressing up with a shoulder holster and new grips (it has original plastic ones right now). I'm looking for a set of simple, dark wood grips that bear a similarity to the wooden grips of the WWII-era PPK. I hoped Navidrex made some dark walnut ones, but apparently they only make them for 1911s & P35s. Any options?