Yeh they were an option, think they were loads extra like 1k, thats because if theyre factory fitted they come with auto levveling with a sensor on the rear arm so when you go over a bump you don't blind people. If your retro fitting them you will need the headlamps and ballasts though. If you were going to do it properly you could buy the rear end off a full fat 1*2. I imagine this will run into mega bucks though. Its not a legal requirement for the washers unless theyre factory fit i believe, but the auto levveling is a legal requirement. However i suppose you can get away with this easier as you could claim you werent aware of the fault, ive heard they become faulty on a lot of factory fitted ones anyway.
thanks
josh