STL file for the combined W-hanger, spring and axlebox and cover.  The original prints were very fragile, so were strenthened by thickening the spring unit and adding a support structure behind the scroll of the box cover.  You will need four of these.  In use the axle boxes were in fact 'dummies' as the axles were carried by the gear boxes and shortened at the ends so do not come into contact with the boxes.