Hey Mike - if you're not already a member, check out OWWM.org. (Old WoodWorking Machines). Once you are registered as a member/ user, go to the BOYD forum, (Bring Out Your Dead). The guys over there really like their acronyms, ha.
The BOYD is effectively the classified section for old machine parts/ components that don't otherwise exist in the wild - and the group over there is extremely helpful. If you don't immediately see what you are after, post a want add there, and I am almost sure someone will reach out directly. The knowledge and "spare parts" collection (hoarding?) of the folks over there is impressive!
Good luck.