Xbox Controller Extentions

I really need to get soem of these. so i can be in bed and play my xbox.. :) jokes. but i do need them. andi'm gonna need an extra one to make an uplink to the xbox for my external hardrive which i'll use to transport my save games etc.. i'm not buying another memory card.. its quite simple i already got the other thing i.e the female usb to serial connector so i just need an extra serial to xbox connector and i can do it.