Hi wanted one of those kits or models for a long time , As you say maxwell hemmens sold the kits many years ago who updated the kit, before that they were sold by a company called OCEAN MODELS who made a limited edition number they also made the formidable steam drifter ,skeandu clyde day boat, and yvonne thames tug, I made the formidable many years ago approx 1992 got the kit from westbourne models,basically a g/f hull and a box of wood,I have never seen any come for sale on ebay or on the net but i just missed a unbuilt skeandu kit about 4 years that was advertised in model boat magazine,incidentally the cost of skeandu in 1992 was £235.00 not cheap then,Hope you get lucky,Kind regards Allan.