wtb outboard motor 8-15 hp

hi guys , one of my mates has a 3.8 m flat bottomed v nose punt and his motor has blown up (he had a 70's vintage 20hp on it) anyway he is looking for a secondhand outboard  going cheap age is not an issue as he is a pretty handy mechanic on most things with a motor, anyone have one or know of anyone with one to sell cheap??   cheers