Right now I am just a little too lazy to look up anything but there were a couple of comedic gunfighter ballads from the 60's. I think one was "Irving, the One Hundred and Eighty- Second Fastest Gun in the West" and another was a parody on Lorene Green's "Ringo". The Sons of the Pioneers did a neat little number "Curly Joe" I believe, or "Curly Joe From Idaho" about a card cheat.