FWIW, if you have the old idler, it can be rebuilt by Russell Industries on the east coast:
http://russellind.com/downl.htm
The PRB catalog is the old Projector Recorder Belt company that was located in Whitewater Wisconsin prior to Russell Ind. buying them out. Their work is excellent BTW; I've had them rebuild idlers and pro audio tape recorder pinch rollers a number of times. You need a lot of precision with 1" wide pinch rollers!
http://russellind.com/downl.htm
The PRB catalog is the old Projector Recorder Belt company that was located in Whitewater Wisconsin prior to Russell Ind. buying them out. Their work is excellent BTW; I've had them rebuild idlers and pro audio tape recorder pinch rollers a number of times. You need a lot of precision with 1" wide pinch rollers!