Even if you want a ring, we got wooden rings. Cost like $100 for some really nice ones with fire opal inlay from an online craftsman. I've already cracked mine a little by being a dumbass with heavy car parts so I'm just ordering another. It's cheap, and on top of that if I had dropped a brake rotor onto a gold or metal ring it might have gotten flattened and trapped on my finger. The wood just cracked a little and flexed right back into its original shape.

If I had a lathe and some motivation I could even make my own, but I'm happy paying the relatively modest price of a single Benjamin for a well crafted ring with inlay.

Keep it in your pocket

I got my husband an engagement watch. It's an analog watch with a 24 hour dial, and it was very hard to find. He was delighted (especially since the ring he was getting made for me was delayed by about 4 months because of Covid)