You might be interested in the movie The Long Riders, which featured Robert, David, and Keith Carradine ans the Youngers, Stacy and James Keach as Jesse and Frank James, Nicholas and Christopher Guest as Bob and Charlie Ford, and Dennis and Randy Quaid as Ed and Clel ("Clel?") Miller.
It was one of the greatest casting coups in Hollywood history. It was also highly entertaining, if (predictably) violent.

Dan Mathews,
Torrington, CT