I don't know about a download of that particular piece. But the three Mascagni pieces I mentioned are included in the soundtrack CDs from "Raging Bull." You could buy the entire soundtrack (2CDs) from Amazon. Or, perhaps some online outfit permits downloads of individual tracks from the CDs.

Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.