Since getting something locally in New Zealand seems to be an issue, and international shipping seems quite expensive (and seems to be something you perhaps can’t avoid), you could perhaps look at www.einradshop.ch (from Switzerland).
I haven’t looked at how prices of various models fit into your budget but he offers a 10% discount for ‘self-assembly’ which may help to offset the shipping cost to NZ – see his post linked below. www.einradshop.ch is a regular on here so you can easily ask him any questions.