Perhaps you have a contact who could ship it to you, you could have a few bricks shipped to Noumea (it will have to go through
Customs, and I don't envy you explaining what it is for, my French is pretty limited.) You can arrange it beforehand to avoid duty on it. That involves letter writing in French, which may be more doable. It IS for a yacht in transit.
Similarly, you could have it shipped to
Australia. But honestly, if you're having visitors, let them bring (between them) all you need to get to NZ or Oz. They should bring some kind of
boat gift, you've just made it easy for them. Amazon will ship to them w/o a problem. There is also Amazon.au.
Ann