I bought mine from rpmoutlet.com, they sell the motoblue kit.. works like a charm and although rpmoutlet.com doesnt have the best reputation i was lucky enough to get my kit in good time. Install only took about 1 hour due to the fact that the lines were already prebent.. the most time consuming part was wiring the wires to the solenoid. I had bought a Hurst T-handle with the momentary switch a while back with the intention of using it with the roll control and it works great!
I have the same kit from RPMOutlet, and I am completely happy with it. Some people believe it is unsafe to use a single solenoid kit but I have had no problem form mine and I dont know of anyone who has installed one that has.