There was a 35mm scan done of the trailer here
But they added a watermark in some bits so it might be worth asking them if you can get the file to do a proper restoration if you want to that is. Bear in mind also that this version only seems to be available in a cropped version. I can not seem to find an un-cropped version of this trailer anywhere in a proper widescreen ratio. And I am a bit gutted that it does not seem to exist.
There is also the Vivaldi trailer which is proper scope 2:35:1
https://www.youtube.com/watch?v=CroqdjDv82s
But the only missing footage here is the extended R2-D2 on tippy toes as Kershner put it. Other than that it’s Blue Lasers. by far the best Narration though.
@Jonno - Earl Twiss just replaced the scenes that were not in the film so they are not the original trailers! 😃