I would look into an aux port or new head unit. Unless you don't mind using an external Ipod/Mp3 adapter for your phone or Ipod thru the radio. That's what I do with my 03 but I don't drive it every day, so it doesn't really matter that much.
If it's a daily or something that gets driven a lot it'd be worth upgrading to a new unit. The 6 disc changers are a pita to work on and most of the time you spend 6 hours trying to fix it and it still doesn't work...I speak from experience
12 Black GT500 SVT PP l 2.6 Pulley/Idler l Airaid l o/r X l 305 NT555R's l Recaros l
04 Azure Blue Mach 1 / 03 Sonic Blue 3.8 / 14 Sterling Grey F150 FX4 402A 5.0 / 11 GT500 R.I.P.