The same issue comes up with regular acoustic piano parts.  There has
been some attempt in the past to do something like this but it seems
hard to nail down.  I had problems getting some brass flanges for an
old Chickering grand as well as a pedal lyre.  Lots of emails and false
leads later I got the parts.

A tech on the West Coast has what is called "the jar."  It gets passed
around and the person in need takes what he/she needs and sends it back
or to another tech as directed.  I was able to get a few brass whippen
flanges and some jacks for a Chickering quarter grand.  I paid the
postage to get the job sent to me and to return it, the parts were
free.  Perhaps we can get the PTG to get behind the idea.  Maybe they
would entertain free ads for those who need parts or would like to pass
them on.

James Kelly