Try calling the main reservation phone number and they will give you the phone number to the company that they support, thats how my husband got them.
Or you might try calling the Disney World Florist and ask if they can deliver them to you.
My husband brought ours into the reception and put my hat on for me and we have pics of us in wedding apparel dancing with them. - bring bobby pins for the brides- it will NOT stay on my itself.