Here's a Wikipedia article about Modesto Varischetti. It has links to other articles, the best of which is this one from The Sydney Morning Herald.

John Callaghan sings THE BALLAD OF VARISCHETTI on his album "Callaghan's Gold" (1992). I can't find any lyrics or sound samples or evidence that anyone else has recorded it. You might try contacting John Callaghan through ShoutLife.com.