I shared this with someone who inquired on buying mine after telling him it won't fit his 1st gen so he can adapt the design for his truck. Mine was on a 2010 Access Cab.
So I figured I might as well make it available to anyone. Feel free to use the design any way you see fit.
P.S: If you are a fabricator and use it to make money, please think about maybe buying mine that I have been stuck with for almost a year
P.S #2: The finished product has smaller tubes, about 4" long, at an angle on each side of the vertical posts. I forgot to put them on the drawing but they were added during fabrication. You need them or your corners WILL open.