You might call Hal DuPont and ask them who they would recommend. Hal (and now his daughter Kemble) run the largest Kreighoff dealership from Vero Beach.
One stock company that comes to mind is S&S out of Montana - they do very nice custom stocks as well
You could also call Ron Fisher at Silver Dollar in Odessa, FL; he is a gunsmith and stock man who, IIRC, also does adjustable combs.
Mike Sherman of PMS is another
But I would still start with DuPont for their recommendation