I have done a text search, but didn't come up with much info.

I'm looking for a TIM or SIM store near Piazza Navona. Anyone know of one?

Bros S.R.L.
Centro TIM
Corso V. Emanuele II, 93a/95
00186 Rome
TF +39-06-6880-2888
Fax +39-06-6821-0252

I am almost certain this is the one I used right near P. Navona, I have been there a few times to recharge my card.

From the Web site of TIM Italia:

BROS SRL
Corso Vittorio Emanuele,93/95
00186 ROMA RM
Telefono: 06/68802888 Fax : 06/68802888
Assistenza: SI

Thanks SeaUrchin and Eloise!

I purchased a Windstar card for my phone from a little mobile phone shop just off the Piazza Navona. I believe it was on the Via dei Gigli d'Oro, north of the Piazza by 2 blocks. They had a promotional CD with a Windstar card included for something like 9E. I took the card and threw away the CD. The owner was most helpful. BTW, I think there is also a TIM shop on the Via del Tritone. We passed it on the way to the Trevi Fountain and went in because I had not yet bought by sim card. The store was mobbed and they were handing out numbers for customers to wait in line for service. On the way in, a disgusted customer gave me his number because he was fed up with the wait. I didn't wait either and instead made my purchase later in the day from the little shop near the Piazza Navona.

Thanks for the further info, sharkmom.