Have a look at wave tribes airline surf board costs it has been updated for 2017. Seriously though I would consider buying the US board of your choice on line and see what their freight charges are. They pack it and assume the risk for damage. Often name companies have outlets in NZed
Cost to you of bringing it yourself , board, board bag shipping, risk of your new board being damaged, accompanied board often arrive with dings.
IMO there are really good shapers in New Zealand buy at home is a better option.
There is another option that enhances difficult travel , a Pope Bisect. Board, comes apart into 2 sections at 4'6" inside a board bag. Travels well surfs well and comes in under most difficult dimensions and weight. A Good board too.
