My 1968 reel-to-reel Sony Videocorder, long on the shelf, has a need of replacement video heads so that I can recover many hours of family and other historical recordings. Would appreciate hearing from anyone who may know where to find a set of video heads. I'm working with a professional restorer who says the machine is fine except for this fatal flaw. It is possible to "borrow" heads from a museum machine for this use as I will be finally fully retiring the machine after this work is finished.