yea its KCA-121b and then from that just rca to minijack which can be found anywhere like radioshack.
I myself..went and bought the whole adapter unit today

im in the middle of the 2-minute process of putting it in, seeing as i already let the ai-net bus hang by my glove box when i installed my alpine.
Just updatin the ipod before i test er out, gotta have new songs to test....Obviously!
oh yea, about the rear speakers, i apologize for that question, i never even looked for them,i figured they were in the back window area, little did i know that when i checked today they were in the rear door..stupid me :-/
Thanks for all the input ima go see how this thing sounds and works with my cda-7894
-Snipey