2006 Mazda Tribute - Aux Input Addition

[CChris704]

We want to ad an Aux input for my girlfriends car but we don't want to pay $100 for one of those car kits with the ipod input and charging, etc. Do you guys know which adapter I need for a 2006 Tribute w/ an OEM stereo?

It's the 6-disc version of this bad boy: http://media.ed.edmunds-media.com/mazda/tribute/2006/ei/2006_mazda_tribute_4dr-suv_i_ac_ei_1_500.jpg

Thanks in advance!