I ended up putting on a hitch so I could use one of those fold-down bike
racks. It looks very similar to the SA hitch, but has a tongue with a hole
so you can install any size ball. It originally came off of a '71 411 sedan,
so chances of finding one are pretty rare.
For pictures and a writeup, go to
http://home.earthlink.net/~tjhannink/optionalfeatures.htm , scroll to the
bottom of the page.
Larger photos are available at http://photos.yahoo.com/tjhannink , Select
[Vanagon], then [Hitch and Bike Rack]

Tim Hannink
Goldibox - 1987 Westfalia Camper, Wolfsburg Edition
Winter Park, Florida
http://home.earthlink.net/~tjhannink/