Headphone extension cable for iPhone 4

Hi, Just wondering if anyone here can help.

Im looking for a good quality cable to use as a headphone extension lead for my Iphone4.

I intend to use it at my work desk, where the phone will be sitting in a dock at one corner of the desk (out of harms way). I will run the cable through the cable holes in the desk, and tape it underneath where i intend to have the socket end at my normal seating position, where i can then plug in my headphones at this point.

Im therfore looking for an approx. 3m long cable/lead with male 3.5mm jack plug at one end and a 3.5mm female socket at the other, preferably both with 4 pole (3 rings on the jacks) connections so I can still use of the inline control on my headphones. As I mentioned earlier I want a good quality lead.

Ive tried trawling the internet and there a few decent 3 pole (2 rings on the jack) leads, but as far as can see no 4 pole versions.

I did notice that some electronic suppliers are selling 4 pole jack and sockets individually but none made up into a lead with decent cable

Any info would be appreciated. Thanks