While in Rome a couple of weeks ago on B2B I contacted
www.limoinrome.com email: claudio@limoinrome,com
Fantastic tour, we had Claudio. Joanna also used them, their driver was Luigi, and we all toured together. Claudio recommended doing certain sites at certain times (i.e, St Peters and Basilica first thing in the morning and that was right on, very little crowds, short wait getting thru security). Great tour, and they were happy to tailor things to our needs and wishes.