Yes, I know there's at least one other record that had as its B side, the same song from its A side played backwards. It's "They're Coming to Take Me Away, Ha Ha," a modest but splendid hit by a gent named Jerry Samuels who went under the name of Napoleon XIV. And there may be others.
And Michael Frank informs me that the video of the Cathy Rigby Peter Pan is available as a streaming video (not a DVD rental) from Netflix. If you have a kid who needs to be introduced to musical theater, I can't think of a better way, apart from taking them to see this in person.