Just bought myself some 4 way carbon wrap electric window switches from a chap called Phil (Mad Cornish Pastie) on VVOC. £17.50 delivered inc. PayPal fees.
He's doing a few different items on there at the moment.
Here's an example of some 2 way switches...
You can see some of his other bits here...
http://www.vvoc.com/forum/showthread.php?t=322810
