Trust me this is website to go to http://www.china-walmart.com/product/cat...
They have the best fashion T-shirts I will suspect you will find what you looking for.i ever bought some accessories from this website, really good quality, lol...so beautiful, and the store worker are all kindly, lol...really cheap.
There are 30B's out ther you have to buy them online.
You do sound Like your closer to an hourglass shape. I think that when it comes down to it you will have to buy things and have them taken in. Even if you shop petites you will have to have your dresses and pants hemed buy a pro. you can get this done at dry cleaners. It will cost you more money but you will look really good.
You might want to remeasure yourself to make sure you are a 30B. Basically you can't really be a 30B if you measured around your breast Please use this site to measure yourself and get the right size for you. http://www.thinandcurvy.com/2010/10/how-to-measure-your-bra-size-correct.html
Basically if the 32B cup fits your breast but not back then, you could be a 30C 28D 26DD or a 24E.
Now if the bra doesn't fit all then just measure yourself to get the size and see.
Please check out this review for Ewa Michael they specialize in small band sizes.
Please also check out this video to see how a bra should fit you.