Nope..Not finding anything that would work..The only thing close to what you are talking about, is a bra with fake breasts in it..But that would be even more noticeable, and i'm sure that isn't what you meant..
Cosplay DA Regular DA
Kumoricon 2014 (so far):
-Sora (Kingdom Hearts 2)
-Serena (Pokemon Y [It's the one I have lol])
-Akaito (Vocaloid. Black & Red Ver.)