Where to get internal Power Cables (UK)

Heyo, I recently got a PSU from a friend, the thing's a Corsair HX1000... wasn't using it and my old one decided that it was a prudent course of action to break. The problem is, I have this lovely PSU and I am not able to wire up many of my hard drives. I'm in need of 6 pin to SATA cables,

http://img.hexus.net/v2/psu/Corsair/1000/DSCF6081_cropped.jpg

however, googling it yields me with these cables for ridiculous prices. Anyone got any ideas?