Listen to broadcast radio (on cable)?

Does anyone know where I can get a "channel" list of the radio stations on the cable? I live in the mountains east of San Diego and there is extremely poor over-the-air reception here, so the only way to listen to the radio is over the cable, thru my TV. But I've been unable to find a listing of the stations available. I'm on basic cable, so all the radio stations seem to be on a subset of channel 81.

The only thing I've been able to do is sit down and scan the channels one-by-one to listen to what's playing, and try to recognize the station. It's pretty tedious, as you can imagine. I'd like to just tune to the station I want without spending 15 minutes listening to individual stations while trying to figure what station I'm tuned to...