Shopping...success?

Ah, I have found the loveliest dress! I needed to find a formal evening gown for the black tie wedding reception of a couple I'm friends with. I was going to go to Cache' (WHY can you not do accent marks in this field?) but decided to stop at Lord and Taylor first. Tried on four dresses. One didn't fit at all. Two fit below, but were too tight on top. The last...gorgeous! It was my favorite of all the dresses, too. Yes, it was black, and I'd really wanted some shade of red. But it's Spring, and everything was PINK in the store! That was pretty much the only colour other than black, so black it was. Anyway, it is a wonderful dress. Spaghetti straps, v-neck, v-back, embellished with beautiful beadwork in silver at the bust and down the back. Only problem? It requires a backless bra. They do NOT make many of those in a DD. Scarcely any, in fact. I tried every store in the Cambridgeside Galleria, just to see if I could find something that would work, but no soap. One wonderful woman in Lane Bryant (and every woman who's a DD and up should check that place out for bras) mentioned a store called Lady Grace in Square One Mall. Now, I have no way of getting there, but they do have a web store. I have two CHEAP options that I can see on their site: either some straps that convert "any back-closure bra" into a backless (low-back, really) bra, or adhesive cups in my size. Has anyone ever tried those adhesive cups before? Do they work? If anyone who's tried them is a D or bigger, do they work for larger sizes? Any support at all? Do they make your tits look weird? I don't want a gorgeous dress but weird tits. :)

Anyway, very happy I found that hot little number, and the Lady Grace site...