There've been a number of Superman records over the years... here's a bunch of 'em!
Power Records was a division of Peter Pan Records that was aiming at sales beyond their typical toddler market. Most of their releases were based on DC and Marvel characters, as well as monsters, Star Trek, Planet of The Apes, the Six Million Dollar Man, and other licensed titles! All of the stories on this LP were released on 45, too.
Many of these records have been ripped by bloggers and posted on the net! You can find most of them at the Power Records Plaza blog! A bit of Googling should help you find others!
Most of these records were all-new stories just for the records, while others have episodes of the old Superman radio show!