I do know how to make them, the problem (maybe I was not specific enough) is that the regular blank bone size
is to small for the ´wide´nut style of the skinny neck late 60´s gibson basses. A regular bass blank is up to 6mm wide,
while the gibson nut is 8mm.
I do use StuMac for nut blanks, but neither them (or China/ebay) have wider than 6mm.