Newton Ellis & Co of Liverpool England
http://www.camerashop.btinternet.co.uk/
are great for older cameras - they were able to source a new cell for a Leicameter M for me. Other posters to this thread are correct in saying that a repair will cost as much as you paid for the camera, but it is often the case that there are no examples of an older camera that DON't need repair and, once your camera is fixed, it should last a long time.

Regards,

David