Email to the comune di Saviano
http://www.comuni-italiani.it/063/076/index.html
and ask them for the birth act for grandfather Giuseppe.
A good letter generator found here
http://www.circolocalabrese.org/resources/letters/index.asp

If you get the birth act, there may be information on it about Giuseppe's marriage.
You will also learn his father and mothers name. If so, the Family History Center
has civil records on film to rent for the years 1809-1865.
http://tinyurl.com/8xs2gly

Good luck,
Paul