Have you attempted to write to his home town ( commune)? Here is some information about the town:
Within these pages are#s you can call. You can also try the "white Pages for Italy.
Type in his name and where he was from and you may find some living relatives. I did this for my family in Piazza Armerina and there were 7 families with my last name there. I hit the mark with one of them and have been in contact ever since.
Michael Lorenzo Romano