I only get the digest so this may have been brought up already. I used whatever google-foo I have and came up with this based on the 539Jxxxx movement -     https://fccid.io/VMH-101477-101963/Parts-List/Tune-Up-Info/Misc-Parts-List-Exhibits-884128 Which (I think) points to these folk -     https://www.innovationwireless.com Note the dates on the FCC doc -- 2007. These movements may no longer be available (where have we heard that before...) but Innovation Wireless may have spare parts. Good luck,Jerry Steinback