I am posting this to hopefully help a few people out. I recently changed my axleback and my clamps were rusted and broke while coming off. Instead of ordering through ford for $50/ea., I found a quality replacement part on JEGS. The part number is 30689. I'm attaching a link below. Hopefully some people can save some money on these clamps since ford charges so much for them.
http://www.jegs.com/i/JEGS+Performance+Products/555/30689/10002/-1
http://www.jegs.com/i/JEGS+Performance+Products/555/30689/10002/-1