Actually Del Gago is the name of one of the Early Reggae songs with lyrics about (Spaghetti) Westerns.
You see Early Reggae (sometimes called Skinhead Reggae, because it was their music) have a lot of songs about Westerns, especially spaghetti westerns. With titles as Franco Nero, Franco Nero version 2, Clint Easwood, The Ugly One, Death Rides a Horse, Eastwood Rides Again, The good the Bad and the Upsetter. And I have a couple of songs I couldn't find a movie version of and one of them is Del Gago (goes something like "I am looking for a man called Del Gago... Del Gago! Del Gago! A killer looking for you! Where is he? *insert Instrumental uptempo Early Reggae scorcher"), that's why I use it.
There tons of those songs, a few are on here if your interested (these only have Spaghetti Western influenced music, no other western inspired song or newley made ones like Del Gago, Undertaker, Overtaker etc)