I came across your surname on the message boards. I accidentally received a marriage certificate for a coachman named Domenico DiRenzo, from Chieti,married in Collecorvino, Pescara, Abruzzo in 1913.
I don't know if this has any value to you, but I can email the certificate as an attachment. I'm still not sure if this is my grandfather. he was born in the late 1880s.