Found on service sheet 320C for models R2765, R2766, R2767 R3045, R3136, R3137.
Hornby X9837 Class 73 Dummy Bogie Frame NEM Coupling And Wheel Retainer
Hornby Genuine Spares X6275 Class 90 Dummy Bogie Frame Wheels Axles Coupler
Hornby Genuine Spare X6622R Class 47 Dummy Bogie Frame For R3905 R3906 R3907 NEW
Hornby Genuine X9920 Railroad Class 37 Dummy Bogie Frame Assembly For R2775 NEW
Hornby Genuine Spares X7841 Wheels Axles Dummy Bogie Complete Set For Class 37
Hornby Genuine X9432 Streamlined Diesel Railcar Dummy Bogie Frame R2768 NEW