https://www.ebay.co.uk/itm/Live-steam-2-5-DYAK-CRAB-Loco/164540584421?hash=item264f6211e5:g:h1kAAOSwag1fgGIf
Better value and ease may come from buying a complete example such as https://www.the-saleroom.com/en-gb/auction-catalogues/wallis-and-wallis/catalogue-id-srwall10083/lot-e8e6974a-5d3a-4021-b7fc-ac8300f1ae9f (https://www.the-saleroom.com/en-gb/auction-catalogues/wallis-and-wallis/catalogue-id-srwall10083/lot-e8e6974a-5d3a-4021-b7fc-ac8300f1ae9f) provided the price is right, allowing for the large premium on the hammer price.
Or as an alternativehttps://www.the-saleroom.com/en-gb/auction-catalogues/special-auction-services/catalogue-id-srspe10405/lot-1818295f-2b6d-4ba3-a2c5-ac790091d5c4 (https://www.the-saleroom.com/en-gb/auction-catalogues/special-auction-services/catalogue-id-srspe10405/lot-1818295f-2b6d-4ba3-a2c5-ac790091d5c4)