Wasn't it a whittled down and polished short section of a Aluminum angle with a hole drilled in a shortened/shaped leg for the stay bolt? I seem to remember the cable had to be threaded through the bracket, then mounted to the fender, which is actually no big deal. I also recall it looked as good as anything currently on the market. Al-you-minny-um (Brit pronunciation) is easy to cut, drill and file to shape, go for it.
