Here's for sale the Ipod interface taken off my 2003 S2K, that I sadly sold last summer, due to a new arrival in the family. I purchased the unit newfrom this site: http://www.discountcarstereo.com/detail.aspx?ID=914, in March of '09.
It's still practically brand new, and in perfect working order.
For those looking for a serious alternative to buying a head unit, this is the way to go. Very easy to install, and works great. This device allows you to control your Ipod through the stereo controls, so no mess, and also charges your Ipod; it's virtually plug n' play!
I am asking $ 70 OBO + shipping.
I am not sure if this unit works on the AP2, so check if the stock stereo has the 14 pin CD changer outlet in the back.
Pics:


Thanks for looking.

 

Sale pending...

 

SOLD.