Stirling Baxi

http://www.baxi.co.uk/products/baxiecogen.htm

http://www.baxi.co.uk/youtube.htm

http://www.youtube.com/watch?v=xJbo3U3viRA&feature=player_embedded

How to hack the engine
Note that Baxi are not stupid, they won't export an engine to South-Africa for example. You would have to rent a house in Germany and have the unit installed, then remove and ship out of the country. One can't simply buy the engine, they want to know what you want to do with it.