This is the basic kit for a 3mm:1ft scale BR Rectank, and includes Gloucester 5'6"wb bogies, and 2'6" diameter 3-hole disc wheels to 3mmFS standard dimensions (not Triang). Please see the 3mm:1ft Rectank Nuclear Flask carrier model for further details, or get in touch with me via a Shapeways converstion. You will need a couple of brake handwheels to finish the model, and I may upload these separately but brass etched ones will be just as good. They printed fine in the Nuke kit (which isn't for sale) but without the print-it-anyway facility there could be frustrating delays at the manual review stage.
Actually the nuke/timber variant in 3mm is on sale - linked here
https://www.shapeways.com/product/2K4CQ8DW3/rectank-br-in-3mm-1ft-with-nuke-and-timber-variant