is there an extension cord for the 360s ethernet cord for live

the only computer i have is on the 2nd floor and the only tv is on the 1st floor, the ethernet cord isnt long enough for me to connect to live, is there an extension cord?, if so where can i find it, thx in advance

Might I suggest buying it from monoprice.com?

EDIT: Don't buy one of the ones that say "System link for Xbox play Halo". It's the wrong type of cord for a 360.