Boxster 987 locking system

[G105ALY]

Well, after driving faultlessly for 6 weeks through Europe we arrived home and the central locking system has packed up. Won't lock, won't open by fob even thought the red dash light flashes. Batteries in fobs changed, all compartments opened and shut and the problem still exists. So off to the Indi and they think it is the drivers side locking module causing the fault which they will quote for in the morning. Any ideas on how much this will set me back? On the plus side they are also powder coating my wheels in matte black, so at least it will look great when I get it back on Tuesday / Wednesday! Oh the joys of Porsche ownership.