Female iPod socket to 3.5mm mini-plug?

[gz76]

Does such a cable exist, and where can I get one?

The reason I ask is that I have an iPod integration kit installed behind the stereo in my car, which connects to an iPod via a standard male iPod plug on the end of a length of wire. I'd like to have the option of running a different player through this same device (just the sound, not any of the advanced controls), so I figure the easiest way would be to have an adaptor cable that I could plug in where the iPod goes.

Anyone know if such a thing exists?

[synaesthetic]

I do not think such a plug exists but it shouldn't be too hard to DIY one.

[Punnisher]

Here are some:

iPod/iPhone Dock Connector ordering
Click female ipod recep on the left.