This may be the guy you are looking for in NJ it's is a long shot ...
Email Bigkidz (Peter) a member here who I believe lives in NJ and builds or repairs preamps
Just a long shot
Looking for repair tech in NJ / Meitner
Looking for contact info for the Agon member who I bought a Meitner PA6 pre with missing remote from several years ago. I seem to recall that this person is also a repair tech in NJ and is a regular poster here. I have a Meitner 101 amp that needs repair and thought that this person would be be a good place to start, if you are that person and read this, please contact me. Also looking for tech recs in the NYC area; would prefer to not send unit to John Wright in Canada. Thanks to all for your help.