I have been approached by more Contax 645 as well as 35mm system recently regarding to fixing their equipments. Here is the place that do a very good job with all genuine OEM parts. I also encourage more folks to support each others since Contax is no longer available and information among users are very helpful to others. Since my time on the forums has significantly reduced but you can still email me if anyone need help.

Nippon Photo Clinic
920 Broadway
Suite 705
New York, NY 10010

Best Regards,