My father has one of the above inboard horizontally opposed twin cylinder diesel engines which is surplus to requirements due to him fitting a lighter engine in his launch.
The engine is ex Navy and has never been used since being refurbished in 1979. It is complete with stater/dynamo, gearbox and gauges.
Please send me an email if you're interested and I'll either get you more information or put you in touch directly. I have some photos of the engine that I could send if required.
Cheers, Iain