I just watched this video https://youtu.be/XvWbl0856zc
and I don't think these are going to be an issue. The flag bolts I can make up with a welder and grinder. The stiffeners are nothing more then strips of metal with holes drilled in them. That stiffen that area of the seam to keep the bolts from pullng through. Its not rocket science for sure.
They are a little scuffed up so Im going to rough them up a little with scotchbrit and spray them with a bed liner type spray.