I assume i have most of the OT saga mattes that ILM used. This was from a private collector that gave it to me in studio scale that was originally used.
For example the bespin platform with the falcon matte is 6174x3456 px.
You can even see the painted strokes outside the frame :)
I see what i can do finding this for ya ady but i cant promise for anything :)
EDIT: He said no. :(
-Angel