I found it!

I have found the dress and just have to order it (thanks Aunt Carol) and get my measurements taken. The only debate I am having now is whether to have the alterations done at the store or in Massachusetts. I don't know how hard (or easy) it will be to find a trusted source who will do the alterations in Massachusetts.

Because I love my dress so much and don't want her to be cheapened, I am not posting a link. She is a dress that is so beautiful that she must have the right setting, musical accompaniment, lighting in order to be unveiled. She is a bit shy - sorry.