These guys did the stock AM radio in my '73 W200, so it is all modern internals AM/FM stereo with a jack to plug my phone into for tunes. Could have had either a mini-USB or bluetooth connection. 8 speaker output also, but the radio looks just like it did from factory. A little on the pricey side, but I like it.

http://www.turnswitch.com/

There are a couple more out there doing this also.