Check the Battlefront II cinematics and concept art. I think you can find usable establishing shots there.
Also give Rogue One a look for the Rebel Base and space shots.These might allow you to integrate the deleted scenes a bit better, because you need something to cut to and from, specially when you have music 😃
Where do I look, as far as top quality is concerned?
BII is game quality and RO is movie quality.