Gap does have some smaller sized padded bras. I wear a 36A & they do sell that size (I've actually had saleswomen in Victoria's Secret laugh at me when I asked for that size! Although they do sell it online.), it fits great & gives me nice shape. Thank god for padding--I always tell my friends to forget about kevlar, I have enough padding in my bra to stop any bullet LOL.
I just don't understand why athletic tops have to compress what little I have in the first place. Why not some underwire & padding in athletic tops? It wouldn't interfere w/working out & at least I wouldn't look TOTALLY flat.