Hello, tinybuns (what a cute screenname!), and welcome to our board! About the only idea I can think of for you is to search the Google bar and see what comes up.
I entered the words "petite swimsuits" and a lot of websites came up that you could check out.
Where do you go to buy your clothing? Perhaps some extra-petite shops could help you with your tiny size. Sometimes, a person can get a dressmaker to make you a swimsuit, for I'm sure they have patterns for petites, and if they're clever enough, they can trim down a pattern to make a good fit.
That's about all I can come up with, hon. Our Internet is a world of information for one to locate anything they are looking for, so I'd try that first if I were you.
Again, Welcome to 50 & Fab, and I'd like you to come back and let us know what you found out. It could be information that might help someone else out in this respect.
I've shopped with this company before, and looking throughtheir suits I noticed a few in a size XS 0-2
Have to admit, I tried several other sites first but didn'tfind anything smaller than a six.