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.
www.julesborel.comDave's watch parts is another
daveswatchparts.com
Esslinger's
www.esslinger.comThen there's Otto Frei in Oakland
www.ottofrei.comHope this helps.
Let me know if I can offer any other info for you
Randy