Give PREMIER ELECTRONIC SERVICES a ring they may help and as repairers go are quite reasonable, I would trust them.
They are in Sheffield 0114 2699923.
If these cameras were mine and were in pristine condition I would want them fixing they really are superb. Old guy I used to work for in Notts had every Ikonta ever made, a truly awsome collection I used to have to use them to keep them in good nick. some of the early lenses although not coated were sharp as a needle.