I'll third that (OK, that was corny).
I agree, there is nothing available for my 82.
I'm going to have to have one custom made and will probably cost quite a bit of money.
I'd buy a pre-fab bumper, one that utilized the 4 existing mounting holes and two additional mounts to the body mounts.. or had alternative mounting option.
The existing 4 simply won't cut it.
good call Hawaii500!
take care...