I had Whiteflash make a custom one for me, and I could not be happier! You should check out their website or give them a call. The price they gave me was better than all the designer settings, and was a perfect match to my ering (both are their w-prong design).
Alright, I like the 5 stone SHARED prong type where the 2 shared prongs are closer to the center of the ring. Does anyone know who cary one? Any website that may have them?