Can you change your ticket out to the next day ?
Weigh that against the cost of a private service to get to Rome
another option... see if the airline will let you fly out of Florence.
The easiest way is private transfer
otherwise you are taking a train/car to Florence then train to Rome then getting to the airport.
Alexandr Pushkin, Carnival-Holiday, HAL-(old)Westerdam, Orient lines-Marco Polo, Royal Olympic-Olympic, NCL-Dream, Dawn-Princess, ACCL-Grande Caribe, Oceania-Insignia (3), Regatta(4) Marina (1) St Lawrence Cruise Lines-Canadian Empress
Scenic River cruise June 11,2012