The stock item is a standard 3/4in bar available anywhere. A good mod is to throw away the stock links, and use heim type links. They are 10x as strong, and 3x as cheap as the stock item....available from your friendly local speed shop.

Another good mod is to shorten the roll bar by 3.75 in on either end and retap the hole, then mount the link on the FRONT side of the mount (i.e., reverse it). This increases the stiffness of the set-up by aprox. 175%....something that is needed!