Hi Catalyst,
I wish there was a better option for a cable out there - it seems none of them last more than a couple of years in a car though. I'm not sure if that's an artifact of cheap Chinese manufacturing or a design problem with the 30-pin connector...or both. I wish I could design something better, but making products for Apple is a game they've ensured only the big guys can play - everything is completely locked down.
Anyway - you can buy a replacement cable here on Amazon for less than from me:
[ame=http://www.amazon.com/iSimple-PolyWire-Connector-iPhone-IS75/dp/B001TH8O7E/ref=sr_1_1?ie=UTF8]Amazon.com: iSimple PolyWire Car Radio RCA Audio Connector Cable for iPhone or iPod, IS75: MP3 Players & Accessories[/ame]
That is exactly the same cable I sell - Amazon just gets a better deal than I do. If you find a cheaper place feel free to post it here too - it won't hurt my feelings.
I also just asked my supplier about when or if they will offer a Lightning connector docking cable and apparently there is still no word on when or if that will happen. Not even Apple sells a Lightning-to-audio adapter, just a Lightning-to-30pin...lame.
/J