Bras have been catching up with ladies' shapes in recent years, and at last, basques are heading the right direction too. I've found a nice selection just for you, illustrated below.
"BRAVISSIMO"
Large cup bodies/basques, from "Bravissimo", are illustrated below:
"Bravissimo" (click above banners). Large cup bodies/basques up to G/H cup. Also other clothing especially for full-busted ladies (UK)