MP3 Tunes in Model A, Headphones to Aux. Input?

[leo]

I'm looking for a radio technician on this one. I've got a nice GE portable radio that has a headphones output jack, no aux. input. I would like to have an aux. input jack so I can play tunes in my coupe. I want to replace the output jack with an input jack in the same location. No schematics please because I'm electrically challenged, just an explanation on the possibility and someone who could do this for me would be most appreciated.