I recently got a very good deal on an N & W Class J 4-8-4.  The only problem is that it is missing (1) the drawbar; and (2) the two wheel sets for the pilot truck.  I sent away to Bachmann for replacement parts.  When I got these parts, however, I realized that they were not the ones for my locomotive, whose correct parts are shown in a 1990 Bachmann Parts Catalog.  The 1990 catalog shows the correct parts as #3704, Drawbar; and #3701, Pilot Truck and Wheel Assembly complete with Washer and Spring.  As for #3701, I am missing only the two axles with their wheels.  The problem is that the two axles with wheels cannot be just snapped into the truck frame.  The two axles with wheels must be attached to two metal side frames which then plug into the truck frame.  Bachmann says it does not have any of these old parts.  So, I need help, and any suggestions will be greatly appreciated.  Thanks for your help.