[senit] Short throw projector and interactive whiteboard

Several schools I'm working with are looking at interactive whiteboard options.  Some schools want to have a moveable system so they can have it in a classroom or the school hall. I was wondering if you know of any whiteboards with a short throw projector attached to the top of the board? The school I'm thinking of want a large interactive whiteboard.
Many thanks,

Norma Price
C2K / Granada Learning SEN support
Northern Ireland