Make your own with 1/2"x20 threaded rod available at Lowes or Home Depot. Install some 1/2x20 heim joints on the ends after you've cut the rod to the required length, mount & you're done. You only need to select appropriate nuts & bolts to mount the links & you're done. Most any hotrod store or website will have inexpensive 1/2x20 heim joints, you'll need four of them. This is how I made mine & it only took an hour once I got the rod & heims home.