The grips sold by Gun Parts Corp for the Walther PPK and PPK/S are very cheap knock-offs that come _without_ the nut that is supposed to be impressed into the grip itself. Good luck finding someone to sell you that nut.
The magazines are of poor quality as well - the two I ordered had to have quite a bit of work done to them (mag catch slots were out of place and I had to widen them with a Dremel tool) just to get them to fit into the gun. They still jam at least once per loading.
I'd say order the grips from Earl's, although he isn't cheap. Or you might try Bob's Gun Parts out in Arkansas (The URL is
http://www.gun-parts.com/index.html/index.html/), he had the grips _with_ the nut last time I called.
Ajax Grips (http://www.ajaxgrips.com/) carries current Meg-Gar production mags for the PPK/S. Meg-Gar is now the OEM for all Walther handguns, and they are producing "legacy" mags for discontinued handguns as well. Stick with Meg-Gar, they work.
CDNN down in Abilene has a boxcar load of Walther mags as well. They don't have a website, alas, and I don't have their number with me, but they are listed in the Rec.Guns FAQ (www.recguns.com) and I can vouch for their honesty. They bought most of the Walther mags when Interarms went out of business recently.
The folks at Marstar up in Canada (www.marstar.ca) have a bunch of Walther items as well.
I did a web search one afternoon and turned up a company selling wood grips for Walthers, but alas I didn't bookmark the page so I'll have to hunt for it again when I have the time. I think I used Google (www.google.com) and used the search terms "Walther grips wood PPK" to find it.
Best of luck,
Ken Strayhorn
Hillsborough NC