wedding dress for second wedding

Hi everyone. So wedding planning is finally getting underway for Brandon and I, however I have 2 bridesmaids and really struggling to find them dresses. If anyone knows anyone selling bridesmaid dresses quite cheap or even would be able to let me borrow them can you please let me know. I would need a size 14 and a 16 roughly. Just pm me if anyone knows anything wedding dress for second wedding :) thanks :) xox