I'm trying to find out if the melody to Cumbachero is old/traditional, or if it was also written by Rafeal Hernandez. Can anyone help me? Does anyone know about this, or have any ideas as to where I can find out?

I first heard it in a reggae version, "Psychedelic Rock" and was told by a pupil that it's a well known song in Mexico.

Thankyou for any help you can give me,
Andrew Robinson