Built by Larry and Michele Dustman of the Thing Shop in Arizona in the late '80's.
Supposedly one of two made, this is reportedly the only suvivor.
A very unique Thing!
Now being auctioned:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=130189104663 
http://www.sunsetclassics.com./1973-74-vwthing-limo/