at axyz Canadian routermaker someone might can help you..

on cnczone also a few topic of this..
http://www.cnczone.com/forums/machin...ller-com2.html

some company also fix not in production controls...

PROGRAMMER - CAM TECH INDUSTRIES T1055 QTERM-II ROUTER MASTER PENDANT - Control System Laboratories

however it can be very expenses..
if it doesn't work, possible cheaper a new control than finding all parts for..

in 2000 a vfd was unique yet, and very expenses.. today you can get one fo ra lot less cost, also lot more manufacturer makes..