I very randomly came across this thread which is perfect because I've been collecting the Trek movie trailers on 35mm film. A couple weeks ago I got a Search for Spock trailer and expected it to be the one that shows the Enterprise exploding, but it was one I had never seen before with Spock's face in the clouds. I watched it on a flatbed film editor and recorded the playback.
I already "Liked" your post but I thought extending some personal thanks was in order. I really, really appreciate this.
Think there's any chance you could put it up on Archive.org for posterity's sake?