The words given by June (JB3) look to me to be about the same as what I've heard Len Graham sing. I can't think offhand of other songs that go to the same air that he sings. I correspond with Jule Hennigan, so let me know if you have any questions for her (Julie's starting a British tour so will be busy now)

Can anyone confirm that this was the song that was so popular among English speakers that the Mexicans called them "Gringos"?

'FYM' - If you include a line or two from the songs and/or a summary of the story/the theme of the song you're asking about, it helps pinpoint the particular song. It is useful to mention recording artists, especially if it is important to you to ge informaion on a specific version, but often people will have heard the song from a different source than the one/s you mention.