Lucca (LIQL) - 53nm to the SW - It has fuel and it's friendly (Nice town too)
Ferrara (LIPF) - 22nm NW of Bologna - Reasonable restaurant but you have to haggle for fuel (threaten to stay ANOTHER night is how we managed to scrounge some!)
Venezia (San Nicolo) (LIPV) - Grass - longish, smoothish. 2hrs PPR notice for ex-Shengen traffic required. Handling - Venice itself is a boat ride across the lagoon - Watch for large (tall) passenger ships crossing threshold of runway 24 due risk of scratching their paintwork!
Best go on to Portoroz (LJPZ) - Much friendlier, cheaper fees & fuel and a glass of slivovisch (or whatever the local paint-stripper is called) for the pilot at the reception desk. Plenty of nearby accommodation (Try the Hotel Parma (I think it was called) just up the road (and ask for a plate of langoustines for dinner))