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.