Here's Fats Domino, Jerry Lee Lewis, and Ray Charles at Storyville nightclub in New Orleans in 1986. This isn't the actual released performance, but an interview with bandleader and herder of cats, Paul Shaffer, along with priceless rehearsal footage, all of which puts the historic piano summit into context.
I can only imagine how tough it must have been for Paul Shaffer to run that rehearsal with those legends.
And now here is a video containing the actual performance:
Thanks also to commenter John Waugh for calling attention to this video.