These were on a TDK SA cassette. I made a quick copy and posted an MP3 on this page:
http://www.4shared.com/dir/492929/6929802/sharing.html
Let me know if these are not already covered by the ads that have been catalogued, and I can get a CD of WAVs to whomever is in charge of the project.
They are funny to listen to, because the hokey narration was written by someone who didn't know the film (they think it's set in the future), and obviously didn't know what Mr. Lucas had in mind for his characters. ("From the moment he saw her face, he had to find her ... in danger, in love, in STAR WARS!").
David