An Item that I have rearly heard anyone having to replace really, but I suppose they can go. They are generally quite a simplistic device and are probably only 1 hr to replace unelss they have to take the master cylinder off as well and this will add to the labor as the brakes will have to be bled afterwards too.
If it was me I would be scouring donedeal or get the yellow pages out and look for a breaker. You should get one for €10-50. Any old fool could fit them.
Its 10 years old, I think you are probably time you said goodbye to the main dealer and find a good independent.