I found it on:
http://www.tristar-connection.de/ in Germany.
He sells a few of these in the US, and there is a Registered Importer in Sacramento who specializes in Dokas:
http://www.autostadtwest.com/
What's required is just the smog equipment and a lot of paper work. Otherwise, it's just your standard Vanagon. It costs $4000 to get shipped, smogged, legal with the EPA, and registered in CA. In the end, it will set me back about $15K, which isn't bad. It will be worth a lot more once it's registered here. It will also hold its value, unlike my '95 Dodge.
At 112 HP and lighter weight than my 80 HP Westy, It should actually feel peppy in comparison.