Star Trek TOS episodic teasers - are the ORIGINAL versions available somewhere?

The Blu-ray releases (and some DVD releases apparently) of Star Trek TOS feature the episodic teasers. For most of time I thought that these teasers are the original 60’s versions, but from what I’ve just learned, the spinning footage of the Enterprise which can be found at the beginning of each of the trailers from the first 2 seasons have been only added there when the show went into syndication. Apparently originally in the 60’s run each teaser started directly with a shot from the episode. In some episodes it’s possible to guess WHICH shot it was, e.g. during the “spinning Enterprise” shot of Court Martial you can hear the court bell ringing, which is I think a good giveaway of what footage we should be seeing, but in most cases it’s really hard to guess.

So the logical question is - are the ORIGINAL 60’s teasers available somewhere? If not officially, at least in some unofficial form? I have seen some scans from the 35mm prints in the 2016 book Star Trek: Lost Scenes, so I assume “somebody” should have the prints, at least I hope so.