Sorry about those links not working, I guess you have to have the vehicle chosen so it is in your browsers cache, I did not think about that.
The products I tried to link you to would work, but the price ranges from 50.00 to 130.00
If you go to that site, select your vehicle, and search for the following you should find the products.
I will say that the more expensive option would be one I'd only choose if I really wanted to keep the factory radio in there, as for a little more you could get a decent DD deck to out in there with the capabilities you need.
Of course you would need an in dash receiver harness, a wiring harness, an antenna adapter, and a steering wheel audio control adapter if you want to retain steering wheel audio controls, if you go with an aftermarket head unit.
All of those items come to around 110.00 depending on where you get them from, that figure is based on crutchfield.com prices.
Neo Auxin AUXISFM31V6 - 49.99
The Neo Auxin AUXISFM31V6 connects any iPod, Zune, Zen, Blackberry or portable media player to any car stereo quickly and easily. This high-quality adapter broadcasts your devices music directly to your factory radio through your FM frequency. iSimple Solutions are a known leader in high quality audio products, and guarantees the best quality FM Signal Possible.
Auxiliary Input (3.5mm)
Auxiliary input allows you to connect any device that has audio output. Once connected the devices audio will output on your car'* stereo system, with the best sound quality available. This is a great feature for connecting laptops, mp3 players, DVD players, music phones, Bluetooth kits, hands-free systems, and more.
Portable FM Adapter
Portable FM transmitters let you sync your iPod/iPhone to your vehicles radio using an FM frequency. This connection is wireless and does not require the user to connect their iPod/iPhone to the vehicle in any other way. In addition to working in vehicles this adapter can be used to send audio to any FM radio such as home, boat, RV, or even gym.
Neo FM Modulator PODFMPROV1 - 129.99
Hardwired FM modulator. Plugs into the antenna port on the factory radio. For some vehicles an antenna adapter is required. For radios with the RDS function, text will be displayed.
All new iPod/iPhones require 5v charging for power. Many accessories do not offer 5v charging and will only charge first generation iPhones and very old iPods. Our product allows you to jam out while driving and then arrive at your destination with a fully charged device.
Text Display(on supported radios)
This adapter will clearly display artist and song information on your factory radio'* digital display. Radio must be capable of displaying text information. This allows a safer driving experience as the radio display is designed to be safely viewed by the driver.
Online Audio Streaming
No restrictions on how you can use your iPhone/Android means online streaming music sources will still be able to play through this adapter. Pandora and many other applications support adapters with track control features (remote, steering wheel, and/or radio).
Direct FM Adapter
The FM direct connection integration connects directly to your vehicle'* FM antenna, which allows the clearest FM signal to be captured and brought to your vehicle stereo system.
2006 Pontiac Grand Prix GT with SC
1996 Buick Park Ave NA