B.K.
Welcome to the club. I just recently had my chest measured and I too where a G cup. I really did luck up when I found my bathing suit. It is a black and white two piece that actually supports my chest. I tried it out this past weekend and I was as comfortable as could be. It was on JustMySize.com. Check it out. You will find your bras there too. I believe Glamorise has the sizes you need.
Enjoy!!!