1998 grand prix aux input

i have a 1998 pontiac grand prix gtp 4 door.  i have the factory 8 speaker "delco" system, casstte deck, 7 band eq, no CD changer.

i need something to give me an aux input so i can hook up my ipod.  I've seen several PAC devices that might work (aux-pod) but they all seem to require a cd changer control or a cd/aux button which my deck doesnt have.

i'd like to keep the stock deck for the steering wheel controls and the heads up display, so i need any advice you guys have.

thanks.

if theres no changer input, you probably wont have any luck.

perhaps if someone makes some sort of antenna tie in thingy like aftermarket cd changers use...