A one piece set of scales looks to be an easy endevor, but where the fun begins is in the cutting of the slot for the razor There are several ways to do this but not one of them is easy, I have tried quite a few except two 1) a Laser.. 2) a CNC machine...

Now to cut them and basically have a Knife design is easy but the razor will not function correctly, there has to be "Flex" or a "Bow" to the scales and that takes a little doing