Check out this Jeep YJ / TJ bumper design I am working on. The bumper will be fabricated from 3/16″ high strength steel plate. The bumper was designed to fit as tight to the frame as possible. The rendered images you see are from Solidworks which is a 3D CAD design program. The drawings generated from Solidworks allow you to manufacture the parts.
If you would like to check out this bumper in more detail be sure to check out www.motobilt.com