FYI the 3 position panel switch has a resistor clipped to the outside bottom (looks like a rectangular metal plate). I do not know if the blower switch is the same, I don't believe it is, but you may want to check. When the innards of my panel switch broke, I went to my local British car shop and he let me rummage through his old broken Lucas switches and then just gave me 3 or 4 to play with. I was able to find the small spring and part that I needed and rebuilt the switch myself....worth a try....just a thought.