You'll find heaps of mostly terrible replicas of this ring with the search "anima dulcis vivas mecum ring". If you're happy for low accuracy there are also some 3d models floating around.
The weird thing is the ring in the photo, assuming it is the original, says "mecu" instead of "mecum" which is "with me". It's the only word using a Latin abbreviation, I guess the jeweller didn't quite have room. So search for both 'mecu' and 'mecum' I guess.
The ring itself is apparently in a private collection now though, so no chance of more photos.
I would want an actual artifact one. I've seen a lot of bronze ones on eBay, but I don't know enough to know if they're real or not. Given the prices I think that they probably aren't. Plus bronze turns your skin green.