Troppo, this model would be an engineering impossibility........
BN-2A Mk III-5III-2: with sound-proofed cabin.....
There was an Islander in Australia which was used in development of the Trislander had the Trislander long nose. No idea what happened to it.
There was also a number of new Trislander fuselages in Australia, bought off BN when Trislander production ceased. Rumour had it the fuselages were bought with the intention of fitting two V8 engines.