Since it's a NZ based position why is there a need to have a current Aus IR to apply. Providing you have an Australian part 61 ATPL and IR then a check can surly be done in the sim - which your going to have to do reguardless if successful. If your current in NZ and flying commercially surly that would surfice, nobody has a spare few thousand lying around "just in case" when your already current. An ILS is the same at Auckland as it is in Sydney.
And would anybody know of a bridging course that can be done in NZ or Aus via corrospondace for the Maths and English equipment that is now needed