Have a look through my build thread (link in my signature), you'll see the hidden stacker door that I sourced for the house. It's huge. 3 panels each being approx 1500mm X 2700mm. Then the entire 3 panels disappear into a wall cavity.
Is this what you're after?
These 3 panels slide open R to L, stack and then go into the wall to the left: [ img ]
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