Ribbing in Italy is superb, and they do it in great style! You can read about some fun we had a few years ago
here.
I would suggest that you contact either Conny Goldberg or Peter Zurrer. Conny is German and Peter is Swiss, but they both have a load of experience of the area and also speak excellent English -- which in my experience the Italians don't! You'll find their contact details on the Allgemeiner Schlauchbootclub (German RIB club) web site
www.schlauchboot.net
John