I need something like this one
https://www.worldwidecyclery.com/collections/cassette-lockring/products/sram-cassette-lockring-for-11-tooth-first-cog-aluminum
but for XG-1275 cassette
One tire is looks like sold.
There is still one mine on eBay you can try to take ( I am unable to cancel auction because there is a bidding in a process)
https://www.ebay.com/itm/284401250998