There are some NF rings for sale on Arfcom. Seller is good to go. https://www.ar15.com/forums/Equipment-Exchange/NightForce-34mm-1-125-rings-/163-2145274/
Lightly used, includes lower 1/3 co-witness mount. Lenses are clean and free of scratches. No box or papers. $340 shipped USPS ground. $310 shipped without mount
For Aimpoint T1, H1, H2, T2 models and other similar red dots like Romeo5, Holosun, etc. Mount is in like-new condition, includes mounting screws. Does not include original packaging. $85 shipped via USPS
Here’s a pic from Spuhr’s website:
Although they’re back ordered 6-8 weeks right now, Libertyoptics.com has the LHT 42mm in MOA or MIL for $749.99 shipped. Add to cart for price. They’re a site partner here. http://libertyoptics.com/contents/en-us/d142.html