Oh man somebody buy this thing this is a sweet deal it cost me $1,300 you can put this on the top of your truck and put your house on it. Heavy duty FrontRunner platform roof rack. (Now Dometic) Mounts on topper or roof of a car or truck or just about anything else you could think of. It doesn't come with the tracks but they're easy to get. $1300.00 New. Compare here.
https://www.dometic.com/en-us/product/are-canopy-slimline-ii-rack-kit-1425mm-w-x-1560