Cari, if you add an item to your cart, Ground Effect will tell you what the shipping cost is likely to be. It will be in NZD but you can work it out as they will give you the value of the order plus shipping in USD and you can deduct the value of the item(s) from the total.
They also have a cost table here
http://www.groundeffect.co.nz/freight.htm
They say 1 - 2 weeks for delivery to rest of world but it has always arrived within days to the UK