Regarding your original exact question, I had an Italian version 69 Ferrari with an Italian (Rome) made Voxson Sebring original AM radio that no longer worked and would not have worked in the US or Canada even if it did work. I wanted to keep the car original for showing so the following people solved my problem.
The company name is S&M Electro-Tech Inc., located in Minnesota. They're at: http://www.turnswitch.com/services.htm
They restored the outside of my original Voxson AM radio, gutted it and installed 180 watt 4-channel AM/FM stereo with fader, balance, tone and AM/FM switching software-driven to avoid modifying the front fascia of the radio. They even hid an LED (to indicate AM or FM) inside the dial that can be seen only when the radio is on. They can do the Ipod/Iphone thing as well.
I loved it and the Ferrari Club of America and Cavallino Classic judges loved my radio without ever knowing it was a modern stereo built in an antique case.
I thought it was a good deal at about $400, including four modern matched speakers. The only thing I had to do (to preserve the authenticy of the dial) was make my own paper AM/FM conversion chart, since the dial was AM only.
Tom Kizer