Had a look at those stupid prices, in the end took the old bulb out and got a replacement (2 of) from Halfords, £3.50. Nothing special about the bulbs in that car, same as loads of other cars out there. Job done.
I didnt take the arch liner out. Remove the small grille and you can get a socket set on the 2 bolts required to remove the cluster. Took about 15 minutes.