I''ve never seen it either..did you find that picture here on PS? I''m sure you could have something similar made but that''s a pretty ornate and detailed setting for someone to just copy...
That ring was one of the rings that inspired me in my search for the perfect east/west marquise setting. I contacted the seller in NY and had discussed having them make the ring for me. I think they had a wait time of 2-3 months, at that time. I ended up going with WF for the custom setting but I still love that setting. Here is a link to their auction: