Where can I find an affordable swimsuit.....?

I have already checked out Venus and Victoria's Secret. I am looking for some mix and match swimsuits with boyshorts or modest bottoms. I am not a fat person but I don't have a smokin hot bod either so I'm looking for something y but modest. I'm 4'11, 118 pounds and 27 years old so I'm a little stuck b/c I dont want something teeny bopper (too old), not a string bikini (dont have the fig for it) but dont want an old lady swimsuit either. Thanks!