To start sounding slightly like a broken record, I've found some cute 50's-60's style bathers on a mass-produced scale.. by http://www.modcloth.com/.
Now, there are a number of marvelous sections on the Modcloth site, but my favourite by far this season is Swimwear!
A few weeks ago I blogged about Beach Glamour.
They come in from just $89.00 plus postage to your part of the world, however for a timeless look that will last you a few seasons of wear, I'd most definintely consider the investment.
There are numerous cute little numbers for you to enjoy...