Yep, they got adapter cords for everything. Is this what you are looking for?
http://www.amazon.com/Hosa-Cable-CMR.../dp/B000068O3B
Personally, for recording a performance I would run my stereo background tracks into a recording DAW like Garageband, Reaper, ProTools, and send their playback to headphones. Then record guitar as an overdub on a separate track to be mixed with the tracks later. More setup with much better results. If you mic the amp while recording with playback coming out the amp you will create a pretty substantial feedback loop that might get uncomfortable.