Responded to your other thread.. anyway, cable should be £13, thats what I paid the other week. It really is not that easy on the 172 (compared to any other Clio) as clearance down the back to the bulkhead is real tight and you can not just feed it through as it is clipped to the bulkhead in a couple of places. Need to undo the bulkhead soundproofing and the bulkhead metal panel (10mm bolts), you can just about get your hand down to un clip it from the bulkhead then. Remove or pull back the wheel arch liner to get access to where the cable needs to go through the bulkhead behind the pedals. Take off the trim panel behind the throttle pedal. If you do all that you can drop the cable down the bulkhead, clip it in, then feed the cable end through the grommet behind the pedal, clip it at both ends and thats it. PM me if you need to know more.