Sorry for a late response. I’ve been off the forum for awhile….
Not that it’s my job to watch this….just another repair guy like you !
I would contact Jules Borel to start. They can set up an account for you, and they have a lot of supplies / parts.
http://www.julesborel.com
Dave’s watch parts is another
daveswatchparts.com
Esslinger’s
http://www.esslinger.com
Then there’s Otto Frei in Oakland
http://www.ottofrei.com
Hope this helps.
Let me know if I can offer any other info for you
Randy