I've seen some nice winch bumpers, but unfortunately with some not-so-nice price tags attached to them, so I'm itching to build my own. I like both the KOR Stealth bumper and the Prerunner bumper, so decisions, decisions.
I think the biggest issue is the two plates that slide into the frame rails, to which the bumper is attached. Remove the plastic bumper cover, look at lots of pictures, then buy a sheet or two of 1/8" or 3/16" hardboard. Start measuring, then cut pieces of hardboard and duct tape them in place, trim as necessary. Use either cardboard or PVC tube for fog light holes and stinger bars. When you have it looking the way you want it, untape everything and use the individual pieces of hardboard as templates for plate steel.