Hi.....great list..just found it.  Now, all I need is another Vanagon. (had
to get rid of my first one) Anyway....I bought a homemade bumper that used
the original mounting brackets with a 3"(approx) C-channel welded to it.
There was an "L" plate welded to the channel for a ball.  The channel was
small enough to permit the original bumper cover to be used. It looked
stock, but a LOT stronger. I had no problems pulling/towing anything, '60
CJ6 was the biggest.  I only lacked drivetrain power, 2.0 air cooled w/
auto trans.  I'm currently making a similar bumper for my rabbit pickup,
with a split rabbit rear bumper for the cover. (and yes....it's a diesel...
and for some strange reason, I love it!!)
Hope this helps,
dan