Ah well, I tried three repair places, one recommended by a local classic camera dealer. They had no spares, so no go. Newton Ellis don't repair this camera. The third I found on the internet, exchanged emails and sent it in; they quoted three times what I paid for the camera, but they got it back to me within a few weeks. I've put a film through it - no tearing, the exposures seem ok... but the light seals leak, big marks on the negatives, so it will have to go back.