WANTED: OLEG CASSINI CE239 16W, 18W, 20W, 22W

I am desperately, desperately trying to find this dress for my wedding day in May. The folks at David`s Bridal said they can`t get it in time for my wedding. I DREAM OF THIS DRESS. I have a back up dress but I don`t want to walk down the aisle wearing anything but THIS dress. This is the only thing that is preventing my special day from being complete. PLEASE, PLEASE HELP.