Italian/Spanish Ferries ?

Any one knows of any ferries services that sail from Italy to main land Spain?
I’ve been thinking of a trip from Calais down to Italy via Germany, Austria before spending a few days in southern Italy. I would like to Finnish the trip off with a few days in Spain and return to the UK from Santander or Bilbao .But looking at the ride from Italy to Spain seem a like it would take few day and taking a ferry may work out a cheaper option.


Cheers, Steve

Salermo (near Naples) to Valencia: http://www.cemar.it/dest/ferries_spain.htm

Tim