In my limited experience, plastic grips are usually the thinnest of a type for handgun grips.  For example, when S&W updated their (steel) pistols to 3rd generation, they went to a wrap-around style and had to abandon walnut for a thin plastic (Delrin).  SIG, and probably Walther, used plastic for similar reasons.  Wood simply wouldn't work with their designs and still be thin enough. 

Depending on the pistol style it isn't terribly difficult for a wood worker to make wooden stocks for anything, but one can only go so thin.  I'm guessing you probably have the best solution in hand, practically speaking (pun intended).

I know when I buy a handgun, I consider the design and whether it lends itself ti replacing the stocks with nice wood--if I think that will be important to me with that particular pistol.  I'm sure some of you do the same.  In my collection, that usually means common designs like the Hi-Power, CZ-75 and 1911, again for practical purposes.

Those wood wrap-arounds I showed in an earlier message on my SIG P220 were really useless for shooting.