Hmm - just ordered an OpenWRT-compatible home wifi/router - via Aliexpress... it's a GL-iNet Flint2 (GL-MT6000). https://www.gl-inet.com/products/gl-mt6000/ And shame on me, turns out I could've got it for less from the manufacturer's site (~NZ$265 with free shipping to NZ vs. ~NZ$320 with a little shipping + tax)... Live and learn!
If anyone else in NZ is looking at moving to Quic for broadband (where you need to provide your own router), that router is my choice (replacing my own painfully old router).