Anyone know where I can buy these? I have used Brownells in the past but they don't seem to have them in stock any more. I'm talking about the metal rings that go on the magazine tube. They used to be two piece, but later they were available as one piece. I'm in New Zealand so I need to get them here. Thanks in advance.

May honestly find one that works at a hardware or automotive store.

https://reloadingdirect.co.nz/shop/shotgun-stuff/remington-shotguns/remington-shotgun-piston-12ga/

Thanks for the link, but that's only one part of the two part piston ring set.

Try Flea Bay