I made my own wiring harness for the cruise on the AEB.
AEB cruise has a vacuum pump under the bonnet, a vacuum capsule and linkage attached to the throttle body, vacuum hose running from the pump to the capsule and also inside the car to vacuum switches on the pedals. There is also an ECU that sits above the glove box, and its connected to the brakes and various other circuits in the car.
Its quite involved, and not something i'd suggest you take on unless you know your way around a wiring diagram. I had considered making up the looms for people, but you need connectors for various parts of the system and these get silly money buying new. I got the connectors supplied with the various components by the breakers yards i got the parts for, which is fine for DIYing the whole thing on one car, but not ideal if your wanting to supply the looms.