formal dresses

Ok, I try to stay positive, but it's rant time....went to a "high end" clothing store, to the "Petite" department (cause those of you have seen me, know I'm as tall as a lawn gnome, and shaped like a box). I can generally buy a 14 petite, without having to go through the humiliation of a three-way carnival mirror. So, looking for an evening/cocktail dress, willing to pay whatever, and the store's petite department only has such dresses in sizes two to four. Now, what should I make of this? So box-shaped, lawn gnomes aren't allowed at formal events??????????? formal dresses