When i did this, i took a two pices of lexan plastic, the clear shiny stuff that is often used to packaged things in stores, painted it black from the inside (this way it looks nice and shiny on the outside) and secured them inside the rear cowl by wedging them to the right spot, against the sub-frame rails, by using some stryphone. It worked real well. Then all you need is some nice bolts that are a little shorter than the existing ones, I used the ones holding the rear passenger peg brackets, to secure the back down.