Eight bucks each from Wy. River Raiders. www.riverraiders.com

Go to boating supplies and then roof racks.

I was able to make my own for a lot less. I got the cams and webbing from Ragged Mountain in Intervale,NH. They have a website but you will probably need to call them to order the cams if they still have them. I couldn`t find them on their site www.raggedmt.com.

If you use these cams type straps always back them up with a knot. A good bumpy road can loosen them up.

Hope this helps.