Have you tried Seiko’s Service Centre in the USA? I’ve had two vintage quartz watches repaired by Seiko’s Service Centre in the U.K. Seiko doesn’t take on all jobs, it depends on age and the availability of parts.
You could also post your request on the MWR forum www.MWRforum.net it’s an American centred forum for collectors of military watches. I’m sure someone on MWR will know who to go to.
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