I got my valve and wiring harness from Fasse (
Farm Equipment Solutions | Fasse Valves) I did need to modify the wiring harness as it did nto reach to the places I wanted it to for how I wanted to connect it. But the switch is a nice weather proof rubber covered thing that mounts nicely on the joystick with a couple small zip ties. They were really very helpful, especially for such a small order (to them).
You can see the black rubber switch on the joystick, if you look closely. It sort of looks like a gray blob just below the knob in the pic, with the wire running down the joystick shaft and through the boot.
Oh yeah - it took me 2-3 good days to get everything connected up including trips to Metalsupermarkets, the hydraulic shop (twice), hardware store, marking/drilling/cutting and just putzing around with how I wanted to do everything. Don't plan to bang this out in an afternoon unless you are very experienced in this type of thing.