Good luck. Have they called Eljer? (Think they were bought out...not sure who owns them if that did happen). Trying to find or fix a non-standard design of a 50-60 year old toilet is asking a lot. They may be lucky, but I'd not hold my breath! It also probably depends on how much Rube Goldberg blood they have in their veins. WHere there's a will, there's a way, but no guarantees.