When Kimball stopped production of player pianos, they sold their
remaining inventory of parts to Dancing Ivories, 11 Washington Ave,
Bay Shore, NY 11706 USA, tel.: 631-242-0967.

I would suggest contacting them so see if they have what is needed.
There were several models made, and one of them has trouble with
a plastic gear stripping.  The owner of Dancing Ivories has had
replacements made in Nylon, which I have installed on two occasions
with very good success.

Bill Maxim - Maxim Piano Service
212 Newpark Place, Columbia, SC 29212-8666
tel.: 803-732-9225, fax: 803-732-2641