as winter is coming up and i have to start work at 4am i am looking for a heated front screen for my ford focus tdci 2004 sport- some came with the optional heated front screen but mine has not.

can you tell me if the wiring loom will be there at all? so i can just get a heated screen and plug it up? or will i have to buy loom from ford? obviousy ill need to find a switch.

rob