Yeah, they are in Syracuse NY where I live. You will have to pay a flat price of $200 (Maybe more in some situations) and they will rebuild the whole deck. Usually they have rebuilt ones in stock, and take yours and ship you a totaly rebuilt one the same day. All back to factory specs with new parts, with a 1 year warranty. They fixed the Infinity unit for my dads Dakota 3 years ago. We had them rebuild the same unit instead of taking a rebuilt off the shielf unit, it was ready in 2 days. It got a new equalizer, fader control, Digital Display (that was the origional problem) and CD mechanism for $200 because they were all out of factory spec.
They also put a Factory Replacement Antenna (from radio to the tip of the mast) in my 1995 Sonoma when it crapped out, for $26 installed. Same on my brothers 99 sierra.
United Radio has been around since 1926, very good place, not some hole in wall. The automotive OEM facility is huge, and deal with many of the local dealers on warranty work.