I did the install today.
I bought the Motor unit, ABS front wiring loom, relays, relay holders and switch unit through work.
Definately not a plug and play job, but relatively simple with a bit of thinking. There are 2 wires that need to be moved out of the ABS front loom, which I fitted with plug/socket and connected to the switch loom. Then you simply need to provide power to the relays and the switch, which I provided from the accessory loom.
Total time for the install, considering I had no 'instructions' and did it from the shocking wiring diagram, was about 7 hours (undoing the first fastener, to doing up the last).