He would probably have to have someone on the home end with their form of our FFL to ship them to. I would think that any licensed dealer here could ship them.
However it would also depend on the laws of his home country. As to how many he is allowed to have shipped at any one time.
If New Zealand is anything like Australia, it might prove difficult.

Call your states extension office of the State Department. They might have the answers, or be able to point you in the right direction.