[VHFcontesting] Need Tokyo Hi-Power Amp repair facility

[aah1]

I understand from the Tokyo Hi-Power Labs Co. (via e-mail)  that there are no repair facilities they recommend  in the U.S.  for my amp..They suggested sending it (432 mhz HL-90U) to their Japan site for repair. Shipping alone would run around $100 round trip.
Can anyone recommend a U.S. shop that might be able to work on this amplifier? Thanks.
Art K4FTO