I found an aluminum bike rack type bar that is slim like an airplane wing. I used spacers on the ends since the rack piece has a curve in it.
Then I needed a place to bolt it up so my friend Steve over at Dirt Designs cut a couple holes in the top of the truck and welded some tubing pieces to the rollcage. They stick out like horns and I was able to weld up a couple brackets that hold the aluminum bar.