I called RDM And they said they do not rebuild them, only bill
changers. When I called Suzo Happ to order the new one they told me Unitec modifies the hoppers, so we purchased one from a distributor for $691. Unitec technical support could not tell me what that modification is.. New one was in for about a week when it jammed. Found a small #6 washer under the
coin wheel. Thought it would be good to have a spare.