You could do a lot worse than contact the following repairer:-
Camera Repair Workshop
Address: 9 Wharfside, Bletchley, Milton Keynes, MK2 2AZ, UK
Tel 0044 1908 378088
Hours:
Closed ⋅ Opens 9AM Mon
I have had a Rodagon 2.8/50mm APO enlarging lens which was corroding inside and a Minolta XM (X1 in the US) both were given a full service by him with superb results. Especially the camera. The turn around time is about 5-7 working days and his prices are quite reasonable. The company seems to be one person only but he is always very obliging.
Diverting slightly, when Minolta left the marketplace, he bought all the spares available in the UK and is possibly the best repairer to take this make of camera to be fixed.
Phone: 01908 378088