Where can I find a sapphire ring for my wife?

[Pompilius]

My wife is turning 30 soon, and her parents already showed me what they're giving her. They picked out a really nice pair of sapphire studs and a small pendant with the same stone. That got me thinking I could add something from me that ties in with their gifts, maybe a sapphire ring. Sapphire has always been her favorite stone, so at least I know I'm not guessing there. Where would you look for a beautiful sapphire ring for a 30th birthday gift?