I, too, am looking for a keytop machine.  I do not know what brands
there are or if anyone makes new ones.  I have seen one that used a
hobbyists table saw with a 4- or 5-inch blade and a couple of well-made
jigs.  Does anyone have such a device for sale, or would anyone have
experience making one?

The one I saw used a jig and the small saw blade to take down and square
the top surface of the wood key, and a different jig and the same saw-
blade to make the notch parallel to the front of the sharps.  The final
cleanup was made by the 1-inch belt sander which I already have.  I am
open to this or better designs if anyone has one.

D. L. Bullock    Piano World    St. Louis