I wonder if they'll ship stuff home for you like the main Disney store does. Either way, it's probably pricey and totally worth it. Where am I going to put it...?
Doesn't WDW ship just about everything they sell on property? We bought several of the monorail accessory sets some years ago and had them shipped.
It wasn't cheap, but it was much better than trying to schlep them on the plane. I'd agree that the bigger problem is where to set them up when you get them home.
DS8 really wanted the Space Mountain one. We saw it in the Space Mountain shop. It's $229. The Dumbo is less expensive. I think it's around $80, but it's much smaller.