Hi everyone! My ering is the classic 6 prong, knife edge Tiffany style setting (platinum) and my eternity band is white gold. I can see scratches on my prongs from my eternity band and figured I should get a (knife edge) spacer. I have checked a few websites, but must be searching incorrectly, because I can't find them. Does anyone have a link for this item? Also, what metal should I get it in? TIA! 