I am used to european sizing so don't know what 80D corresponds to. (After Googling: Apparently 36D) I lost two cup sizes when I lost weight and I love the shape of my boobies and that they are big and the nipples and everythin. It's actually the only thing I get regularly admiring comments on from both sexes. I would like to lose more weight but heck I don't want these to start sagging. Waaaahaaa!
I love Gossard's & Lejaby's stuff and have found big enough sizes in them. They aren't the cheapes, but hey! Bra really last a long time unless your size changes so think of them as an investment. And get the more expensive brands from sales. I usually end up saving 20% or more that way.