I think that during my early research I came across (I think they were called) "Elite screens" - who made powered screens of all types.
I was going to try to do a mobile arrangement, but wanted to up the quality of the picture and control the light in the room entirely, so I decided to manufacture a sound insulated fixed wall (in a now blacked out room), which I can remove entirely in 15 minutes should I ever want to.
On the fixed wall, I mounted a Carada, see specs below. HUGELY happy with it.
Hope you find what you need.