Pictures for those who have asked
I included a $1 in the 1st pic for a reference as to size.
The 2nd shot gives an idea of the mounting for the light. I have yet to take
that outside to figure it out, but a couple of ideas come to mind.
The 3rd is a close up of the mounting structure.

http://s19.photobucket.com/albums/b152/NeptunoMD/El%20Guapo%20Vanagon/?action=view&current=100_0845.jpg

http://s19.photobucket.com/albums/b152/NeptunoMD/El%20Guapo%20Vanagon/?action=view&current=100_0846.jpg

http://s19.photobucket.com/albums/b152/NeptunoMD/El%20Guapo%20Vanagon/?action=view&current=100_0847.jpg

Hope this helps,
Tony
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82 Scirocco "Rodolfo"
85 Vanagon "Blubrik, El Guapo"