Dick.
As a kid I heard a story about a Sydney bloke who set off on such a journey in a Tipsy Nipper. Now I can't confirm his name or authenticity, (getting on now), but the Tipsy was both a factory and kit built aircraft, one seat and was powered by a Rollason Ardem, (1500cc VW). Just reading up on them in an old "Observers" book, they had a range of about 175 nm, but there was a tip tank varient that extended this to some 400nm x 80KTS.