I have built a bumper for the CJunk5. I made the bumper out of "C" channel and a scrap piece of pipe along with the winch plate that came with the winch I bought. It actually turned out pretty cool. Here are some pics of the build in progress. I will put some finished pics on later.
Old bumper note that it is bent and looks overall like pooooop:
New bumper in progress:
New bumper being painted:
The winch that will be mounted on it: