Large Scale Central

Bachmann Gandy Dancer

As most of us all know, these Gandy Dancers fail due to the plastic gears cracking. I’ve got several of these. Why looking at stuff on fleebay I see one listed and in the description it mentions that it had the gears replaced with metal ones from NWSL. I had not heard about these being available. Does anyone know which part numbers from NWSL?

In case anyone else is interested it is: