Before this possibly turns into something ugly...
To answer the question, yes they are Opentracker design. There is no patent on these. John has given his design to the public. Daze makes a quality roller perch. He even hosts pics of the perches for Opentracker. If John finds his way to this post he'll say the same. If you want to make a set of your own just look it up an Daze's website. You can make them and sell them too if you want.
with his permission. He and I are friends and have worked together in the building of my web page as well as the sharing of information any time either one of us comes up with a new idea to improve the product or how it is made.
I just received a set I purchased through Mustang Depot (for much more $$). Sitting on my work bench waiting for my new coil springs to come in so I can install them.
Looking forward to trying them out! There is a great article on the Ford Muscle web site explaining the in's and out's of the Opentracker's design (and how to make them).