That seems to be quite common with instrument makers, it's so specialised you just can't buy the tools.

A community organisation I have links to was bequeathed the contents of a woodwind instrument makers workshop which near enough doubled the size of their metalworking workshop, I think a lot of his specialist instrument making tools went to a college which still ran a diploma in instrument making, one of only a few in the country.

I also helped a lad out a few years ago with rebuilding a Union Graduate and a Walking Pattern-Makers's lathe into metal spinning lathes, the former for roughing in the shape of steel pans before hammer-forming, and the latter for making cymbals.

When he was done it was quite a sight to see him shaping 40" diameter custom cymbals, the sheer rotating mass of his wooden forms was enough to give me the heebie-jeebies.