Keep a look out on ebay. I've just bought a tested working one with it's paperwork and the loom all complete and connected for 390.
The additional I need to get is the tank and fuel pipe then I'm good to go. I hope :msn4:
I have a petrol Eber for sale - I have never used it so don't know it it does work or not!
Most of the parts appear to be there, but decided not to go this route.
Can post or PM pics if you are interested (think its the BN4 model).