Rockland Standard Gear is our "go to" source for individual parts although we have never needed a complete transmission.
Their customer service and technical support is second to none!
While you cannot go wrong using Bill B by any means, Rockland, being in New York, is certainly a valid option.
Regardless of how obscure the differential or trans part is, they come through each and every time and have for many years.
Simply good to know we have options.
Marty