Please add this to your Mechanical Music Sources List by Daniel Wilson:

Specialty Player Parts¶
Specialty Machine Work for players¶
Piano Tools and Piano action parts¶
Robert Streicher¶
PO Box 39¶
Pond Eddy, NY 12770¶
717-559-7403

This man is most reasonable, a perfectionist, honest, ane comes highly
recommended. He produces many parts for Ampico and Duo-Art, including
the ball bleed valves for the Ampico model B. A necessity if you ever
intend to rebuild one.

Craig B.