Thread: Replacing no longer available rifle parts..

https://www.police.govt.nz/sites/def...-to-import.pdf

It's the std 67b form that you use to import 'normal' firearms and associated components as a license holder. No dealer/importer license needed for this stuff. Apply for the permit, follow the police instructions in their email when they approve it and send docs to suppliers/customs agents as required. I've bought mags in from both the US and UK - it's not rocket science. The suppliers expect there to be paperwork for export/import permits so the good ones aren't fazed by it.
Just don't try and import anything that isn't legal here. Applying to import a 25 round Promag for a Marlin 795 is guaranteed to get you declined.