SKY HD Input cable

Hi,

I've got a sky HD box setup and working fine with my 32", but i've got a new telly coming on saturday which requires me to relocate the box to the other side of the room. Unfortunately the input cable from the sat dish is nowhere near long enough - does anyone know if there is an extesnion cable i can buy or is it an engineers job?

If there is a cable, any suggestions on make/price?

 Ta