I have a 2008 XK and I got the sport bars from my dealership added to the top of my jeep with the snowboard racks on them. If I was to take off my snowboard rack and put a roof rack on, theres these little slots where the racks were and when I drive it makes a whistle noise and I need to fill those empty slots up...anyone know where I can find them? I tried taping it up but didn't work. I can post pictures if no one understands what I am talking about. Any info. would be great! Thanks!