Steamco Engines Australia are based in Victoria Australia and is still in production. My personal opinion is these are one of the best made brands of engine in their price range.
They currently offer only two stationaries, the STC-01 stationary engine and the STC-04 overtype engine. Both engines are made of copper and brass, silver soldered on a steel base with steel flywheels. They are great runners and nice to look at.
They used to offer a marine engine and a complete boat fitted with this engine. They come up rarely on ebay and are worth getting if you have the cash.
This model is now discontinued but if you are lucky you may find one
Here are the specs on it Engine Double Acting Oscillating Brass Boiler Silver Soldered Cylinder Bore 8mm Cylinder stroke 12.7mm Lubricator In Line Propeller 3 Bladed, 50mm diameter Fuel Spirit Tablets Length 280mm Width 100mm Height 190mm
Cost when new $375 Australian
River Launch STC-03
This model is now discontinued but if you are lucky you may find one
Here are the specs on it Engine Double Acting Oscillating Brass Boiler Silver Soldered Cylinder Bore 8mm Cylinder stroke 12.7mm Lubricator In Line Propeller 3 Bladed, 50mm diameter Fuel Spirit Tablets Length 660mm Width 190mm Has mounting for RC steering