Here is a Ebay find, a steam boat kit with a Boucher “Marine Power Unit”

Below are some reproduction “Marine Power Unit” boiler/motor units I made from the original one in the “SNAPPER” boat. This is the motor/boiler also used in the Boucher 100ft Tugboat model, later sold by “Blue Jacket Models”. Tough to find the originals, so I made some up, all parts are interchangeable with the original.