Hi geoneo,
Here's a link to an article that lists the Factory Outlets (and their addresses and contact details) of Designer Handbags in Italy. From the information provided on the site, I think you could start in Milan or Rome.
*Note that this website is an online retailer site and that they are not listed in the SaleHoo directory. I referred you to the site for the factory outlet list.
Cheers,
Haydee