Hi, I recently had the same problem with the heated seats/rear wiper switches. Following andyb's instructions I fitted some LED's I had acquired years ago for a different car and had never used. I have got them all fitted and they are a nice bright blue! When I get chance later I will upload a pic. Sorry didn't get back to you Andy to say I had got it done, but this is the first chance I have had to get back on the forum. Many thanks for your help.