star trek story records:

There were only eleven different original STAR TREK stories, but they have been released and re-released a number of times in different record types. There have been a total of twenty-three record packages released from 1975 to 1979 by Peter Pan Records and Power Records which was a division of Peter Pan Industries. Ten of these were 7 inch 45 rpm records, three were 7 inch 33-1/3 rpm mini LPs and eight were 12" 33-1/3 LP records. Ten of the record sets contained a read along comic book.

there are pictures on the site as well as the text of the stories, but no sound samples sadly. via gmtplus9.