I custom made my own. I have a shaft-type 2 5/16" ball, with the shank/sleeve type setup. The plate is 1" thick x 12" wide and the sleeve is the only thing that shows when you remove the ball. The ball is retained by a clevis pin and clip under the truck. It is much stronger than the 'pop-up' balls. I needed the strength and durability because I pull heavy loads quite often. My design is definately strong and looks good too! I got the basic ideas from a friend and then strengthened it up more.
As another note, I HIGHLY recommend the vacuum/hydraulic brake setup over the regular electric ones. Mine works GREAT and stops well without the use of exhaust brakes or taxing the truck's brakes. Hope this helps!
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1996 White, Extra-cab, 4X4, 5-speed, 4. 10 Model 80 rear, Laramie Pkg, Rickson Truck Accessories 19. 5" wheels with Michelin XZT load range 'G' mud type tires, Full straight-pipe exhaust, Mopar brush guard, K&N air filter, removed turbo silencer ring, 'tweaked' injector pump, well over 100k miles, lots of GOOD, BLACK SMOKE!!, Rollin'-S 25-foot, 10 ton flatbed trailer, with Vacuum/Hydraulic brakes, 16. 5" tandem dual Dexter axles