[MusicMan70]

I believe he got it off of Ebay?!! I've seen similar from Summit and CPP I believe. The pricing range is about $225 and more. Here is a link to one I used...Canadian Made; no switch or relay necessary, just connect two wires and hook up to the Brake Booster.
$300 from Summit...

http://cvrproducts.com/12-volt-billet-electric/