Just done mine, £20 each plus VAT for the cables, 15 min job each side to fix.
Would suggest its a 2 man job to do thos, as removing the metal guide tubes, which makes it easier, is a pain! Refitting is a jiggling pain too!
Also had to heat mine where the cables go into the tube as the old cables had seized in where the plastic grommit sits in the metal tubes.
We had to melt the plastic to pull the old cable out!
Easy enough for the comedy mechanic like me!