Suggestions on who could update and or repair a 1975 Kenwood KR 2600 receiver...


Hello Audiogoners - I need help in finding out who would update, clean and or repair a Kenwood KR-3600 receiver. I bought the receiver new in 1975 and it still works but would any names on who could bring this old receiver some new life. Thank you in advance and stay well and safe.
garebear