Happened upon these a while back when looking at genrights website. I have been looking to do something similar, I dont think I would pay full price, but I'm interested in making something similar.
https://genright.com/products/jeep-tj-lock-load-tub-rail-tie-down-system.html

https://genright.com/products/jeep-tj-lock-load-tub-rail-tie-down-system.html
