They are very expensive, but there is a WDW Florist that can deliver various items and decoration to resort rooms.

http://www.disneyflorist.com/categor...ations/display

I'm not sure how soon it would be delivered, but you could mail yourself a package at the resort, and when you check in, ask to have it delivered to your room by Bell Services. But that might not be in your room when you first arrive and would still be all boxed up. Just a thought.