Some remnants of Artemis remain as an applied technology consultancy. Might be possible to pay to start from that. Is Bernasconi's firm's Gomboc commercially available? How likely is it to have an exclusive-to-ETNZ license? I'm sure they have proprietary parts they might have developed with the...
Google indicates his wife may be Italian, so perhaps he's eligible for an Italian passport.
Edit: forgot to add that perhaps the fourth is meant to be ETNZ because of the long stint spent in NZ.