@NUNYA
I'm looking around on eBay a lot, so after seeing your post, I did a thorough search but only found two that has recently sold. I couldn't find an active listing. They are out there, but others want that ring too, so don't give up, just search regularly or "save" your search and eBay will send you alerts when a new item is listed.
Is there any hope that you may find your original? I know I don't know your story, but my mom lost a ring years ago, we searched everywhere for it, well one day, about a year later, she was pulling out some seasonal clothes from the back of the closet and out fell the ring, it obviously fell off when she had put that stuff away a year earlier.
I hope you find it, either the original or a used one.