Thanks again Alan for virtually giving me the parts and all your running around back and forth to the post office - Top bloke as always!

Motor still at the shop, should not be too far away.
The cut off for New Zealand re tax is $400 New Zealand dollars, so long as the goods are insured for less than $400 no duty will be charged. Other countries most probably have a cut off point too, worth finding out to get the balance of insuring for as close to the cut off point but pay no expensive duty.