dress question

hey ladies,
I am taking a day off work this friday to shop for dresses! I am very excited!!

I've also been a bridesmaid MANY times in the past -- and I CONSTANTLY run into this problem with sizing and I am nervous it is going to happen with my bridal gown. Was wondering if anyone has a similar situation:

I have big boobs but a thin body.. so whenever they measure me and look at the size chart, my boobs fit into say a size 14, but the rest of my body fits into a 10. So, the store winds up getting me the larger dress to accomodate the chest size, and it ALWAYS turns out the thing is enormously huge!!!! Then, I have to pay thru the nose to get it sized down and it never fits exactly right.

Does anyone else have this problem, and how can I get around it??!? I think its going to be $$$$$ to have a dress custom made to my measurements. thanks girls!