I may be able to have that made for you. You'd want to get in flexible plastic though as it would be ridiculously expensive in metal! You can write to me at firstname.lastname@example.org if you're interested.
I've never thought about using 3D printing to make rings, but this is an excellent model you've made. What program did you build it in? I like the subtle texture of the final product; at first glance it looked like stone.