said by DrDrew:
If you're looking for 30-pin female to 30-pin male, I've never seen or heard of one and would wonder about it's use...
 Nevermind they're called "dock extension cables":
»www.amazon.com/30-pin-Ma ··· 04BAC2B0
That would be a good option as I see it's "fulfilled" by Amazon but it's 2x the price that I've seen elsewhere :-(