At the price, why not call Microsoft directly. I'm sure they have details like that on hand.
The price looks to run from 7,000 to 20,000 so I'm sure the cart and such will be there for a commensurate price.
One thing. It doesn't sound like a good idea to put such a high value item on wheels.
Microsoft's new Surface Hub looks really interesting, but I'm concerned about its portability. i want to be able to move it from one room to another easily and would like a movable mount or cart to use. Any one have any ideas about that?