Kevin - the Kressler knives are not likely a good basis for figuring stock removal pricing. Integral stock removal pieces are inherently more work (I assume you know this) and there aren't that many being made anyway.
After you are done grinding away steel from a very thick, thick bar of steel, then you have to fit the scale material in between two rock hard spots. I seem to recall a discussion by Loveless where he bitches and moans about just how difficult it is to do, but that was a long time ago.