Since i had to paint the bumpers when i did the rest of the body paint, i decided to fabricate a trailer hitch into the bumper. i looked and there definitely was room behind the Type 2 early bumpers.
I didn't want anything hanging down and wanted a tasteful look, so i decided to fabricate it between the bumper brackets / behind the bumper and have the hitch receptacle in the bumper itself. After a lot of measuring (using a laser) to get it centered, i drilled the four corners of the hole with a big drill bit (to get a nice radius on the hole), the cut the hole in the bumper. Here is the final result: the washer was used to stop anything from hitting the body (which is only 1cm away when installed). This was pre-grinding and cleanup:
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