Hi guys - try going to
http://www.a-stafford.co.uk/ if you are dead set on using UK suppiers for Lucas switches etc. This supplier is more "cobra oriented" than Vehicle Wiring Products Ltd. I have used both suppliers, they are OK.
Staffords also do the dreaded Lucas "two speed and park" wiper switches specifically for Lucas self parking wiper motors, which should come with a handy wiring diagram (I know, I wrote it for them!)
HTH
Wilf