Try
www.truckntow.com, Keith.
They have an amazing assortment of frame-hooks and tie-down straps. My 'wagon is a little different, so I grab onto the lower a-arm up front and the lower control arm, criss-crossed, out back. Of course I've got an open trailer, so the little movement I get isn't a problem.
Hope to see you on the road somewhere this season, my Friend!