Need 3 Bridesmaid Dresses

Hey I am running out of time, but only because we are looking for a certain style of a dress we found on a few websites but cannot find them anywhere in stores. The problem with ordering them online is the color. I do not know the designer b/c it is never listed. It is Chiffon material, bias cut diagnal hemline. Frilly on bottom. Light blue. Any variety of top will do: spagetti strap, one shoulder, frilled....I just would really love to find these particular dresses. Georgiette will also work. Please help! Examples are Emma and Layla at best prom dresses .com . Thank you! WEdding is August.