I believe "The Gardner" purchased the Maserati's through an intermediary company in Sri Lanka (?). I recall seeing the invoice posted on Facebook I think it was.
They do not have Australian ADR Compliance thus can not be registered in Australia but could be registered in most countries world wide. I heard they were stored in a locked and secure shed near the main wharf in Port Moresby. By now they are probably close to worthless.
That they are not sold indicates someone very high up probably has a longer term "plan" in mind?
I spent a good part of my life in PNG. When I left PNG the Kina was worth Aus$1.35 - today a Kina is worth Aus$0.39. Sad to see it is dysfunctional and close to being a failed state.