I had the same problem (plus fit issues - 34DD), so I had one made:
http://web.mit.edu/ruadh/www/pics/be...ec05/tarab.jpg
If you can make it to Boston, I highly recommend Shadia. She's amazing, and *very* reasonable for the style & quality. Anything she makes you will fit perfectly and be unique. Just be prepared for three visits (one to talk about styles, one to fit the bedleh base, and a final fitting/adjustment), and expect it to take 4-6 months, and 1-2 months longer that her estimate. :) She's making two for me right now. If you're interested, send me a private message, and I'll send you her contact info.
As for pre-fab costumes, the Great Loop is fabulous in gold. Didn't somebody post one (or similar) in the swap meet forum? Also, "Putting on the Glitz" at dahal is pretty, although I'd change the belly fringe.