I have not seen it either, but I am in the US which the US does not seem to get many special pieces. I have only seen the RG pave version.
Asia (and often Dubai) seem to get other pieces made for their market which may be where she saw it and hence was deciding between the two rings.
And yes, you can probably SO that ring if you wanted to especially since you have existing pieces from that collection.
I would think that's a fairly easy SO as they already have the "flowers"... just stick it on a ring!