Unfortunately there is no quick service option to get pizza like the kind the serve at Via Napoli. During peak season, there is a pizza window next to VN, but it does not serve VN pizza. The Electric Umbrella has a vegetable flatbread (according to Allears.net). Otherwise, your best bet is the Boardwalk Pizza window, as suggested by aidansmommy (note, that it serves Disney-pizza, rather than the VN-style pizza).