Hook;
Contact Kevin at KAR Mustang here in Columbus, Ohio. If memory serves me correct I beleive they can get an aftermarket quartz clock. I needed one for my GT but, they aren't cheap. I remember someone telling me one time you can rewind the old clocks somehow but, I'm not really sure how it's done. Talk to Kevin. I'm sure he can shed some info on this subject.
1-800-341-5949 Hours: Monday - Friday 9am - 6pm and Saturday 9am - 1pm eastern time.
Don