I know of the two way "A" relays, but the ones I am referencing are plug ins, have a multitude of mounts for bases and are VERY available even likely at WalMart. I'll get more info when I build mine in if anyone is interested, but they are not in a "dusty bin" as they are in your new vehicle's fuse box, I wager, hi. 73, Don, WB5HAK