Bed Rooms on Event Shelters

I am looking for the holy grail of camping life. A tall tent with a small footprint - basically for Le Mans. I currently have a 3 man tent which is tall but because it has a porch its quite big. However cant find a tall tent that has just the bedroom, probably because they arent stable.

However that got me thinking. On the caravan awaning I have I can attach a bedroom. So gets the height without the large footprint. So is there any event shelter you can attach a bed room too as I could replace both event shelter and tent!

I thought they used to do a bedroom that attached to it, but they might have changed it. Although thats smaller than my current event shelter.