Scratch Build Aid 3-D Printed OO Gauge 4X LNWR Flat Front Axle Box for Wagons.
£2.45
Now available by request as a separate item. Supplied in grey resin. (Wagon or wheels are. Fixing to models may require modifications to the boxes or the model. (See Pictures) Cyano-acrylate type superglue is probably the best option for fixing. ).