Black Forever Yours Dress With Ivory Sash Size Uk 16 + Style; 75203

Hi, I am in desperate need of a forever yours black dress with ivory sash the style is 75203. My bridesmaid is a size 16 but if you have a bigger size i'm sure i can get it re sized. I am on such a tight budget but will be greatful of any help you can give me : ) My wedding is in Sept...... Please Help Me!! Thank You! Jemma x