Buy NZ Made is a good resource;
https://www.buynz.org.nz/
+1 for Cactus Clothing. It’s expensive but they guarantee it for a lifetime and handle repairs.
Some companies I haven’t seen mentioned yet;
Mussel Inn micro-brewery, not sure if their brews are available retail but they’re great!
https://www.musselinn.co.nz/Brewery/brewery.html
https://www.musselinn.co.nz/Brewery/brewery.html
Ocho chocolate factory in Ōtepoti;
https://ocho.co.nz/
Baker Boys biscuits, based in Ōtautahi;
https://www.bakerboys.co.nz/
Last Footwear Company, reputed to be the Cactus of shoes. Can’t find a homepage but they’re on FarceBook.
Haka Clothing is a maybe;
https://www.hakaclothing.com/about-us
They say it’s designed and hand-printed in Aotearoa, but they don’t specificy where it’s made. But someone gave me a Haka hat as a present and it lasted about 15 years in heavy use, so …
Money is much older than capitalism. David Graeber’s book debt has a pretty good history of both.
This reminds me of David Chapman’s comments on how once you can question traditions, as you’re doing here, you’re no longer able to relate to meaning in a traditional way;
https://meaningness.com/fundamentalism-countercultural-modernism