Help with padded swim suits?

Okay... so...i really want to get a padded bathing suit because i'm going to my friends pool party next week, and no, i'm not being sl-tty, there arent even going to be any guys at the pool. it's just, my boobs are sorta a weird shape, and um... my nipple stick out. so yea i was just wondering where i could buy one, like somewhere convenient like Wal-mart? plus, how would i ask my mom for one? would they sell them in juniors? yea really awkward!! but thanks ahead of time ;o)