It'll be more fun, and almost certainly much cheaper, to organise your own trip to Italy. But for the faint-hearted, there are a number of firms which offer package deals including match tickets. Be sure to shop around to compare prices and service. It may worth emailing or telephoning to discuss tailor-made packages.

Lastminute	Lastminute offer a range of European football breaks, including trips to big Italian matches. They offer hotel-and-match-ticket deals, meaning you can organise your own flight to suit your pocket and location.
Matchdays	Matchdays have been organising football weekend breaks for some time. They offer a range of packages, including ones where you can book your own flight. We travelled with them once, and they were very helpful and flexible.
Fanfare Events	Fanfare Events are another well-established firm, and provide various options including flights. They also offer to tailor-make packages.
Football Encounters	Football Encounters offer various packages, and specialise in VIP packages to see Lazio and Roma play at the Stadio Olimpico in Rome. With or without flights and hotels, you can sit in the VIP stand or visit Lazio's training complex at Formello.