I have an unused Sierra Designs Flex Capacitor Interchangable Hipbelt Sz M/L. Bought with the Flex Capacitor, but ended up getting a smaller size hipbelt for GF. Not used at all, just tested it on and taking it off from the frame.
No sure if anyone in NZ has use for it, as it was bought in the US, but thought I give it a try.
Specs are here: https://sierradesigns.com/interchangable-hipbelt/
Any reasonable offer accepted, as it's just lying around unused and would be a big waste to throw it out.
Location is in Auckland.