RE: Steam Launch
The African Queen by Billing Boats has some of the best laser cutting ever seen. It has a replica steam engine kit with it that is very detailed. Perhaps the boat could be modified for live steam but that would be a serious piece of work. The kit is quite detailed and is certainly not for less than an expert builder. Finding a steam engine that will have throttle and reversing is possible but difficult. Try someone in the UK for engine information. They seem to be more advanced in that field than we are here. There are live steamers in the US. Most are in the railroad hobby.