hanging lights

I'm in a dilemma here - I am not able to hang the lights from my ceiling so I am wanting to do something on the lines of this. My tank is 72 inches long (Or 182.88cm) and for the life of me I cannot find a kit that will fit the length of my tank! Does anyone know of a website I can find them on...

I have small tank from Planet Aquarium (18” wide by 21” tall by 30” long) which I am setting up in a peninsula style using a Modular Marine external overflow. I decided to mount an adjustable height 8020 slotted rail on the wall to go over the tank for my Kessil lights. This is the hardware...