I recently bought a 2003 Accord LX which came with the standard radio and single CD player. My wife likes to listen to books on tape in the car. (Many more books are available on tape than on CD.) I am looking to add a cassette player to the existing factory radio. Quality of sound not important as it will be used only for books on tape. Any ideas on how to accomplish this without spending the $350 (or so) that Honda wants for their player, which conveniently fits under the door beneath the radio?

Any help would be appreciated.