What is the top vehicle? Is it available in the US?

It has many names. So the simplest answer for you is;
T3 Syncro Double Cab, or Doka  (Think Vanagon chasis with a truck body)

More technical answer;
Volkswagen Type 2 (T3 (aka T25)) Transporter DoubleCab Syncro (Rally Race prepped)

Syncro = all wheel drive

Doka = double or twin cab, derived from German word Doppelkabine

My guess is that one is late 80’s. They were never officially sold in the US, but they have a huge cult like following.  I saw one go for $40,000 last month and have seen them go for almost $90,000 for a Syncro Vanagon.
They are amazing vehicles, and I love watching the old rally versions in action.
Here is a concept car picture
http://upload.wikimedia.org/wikipedia/commons/5/56/VW_T3_Syncro_DoKa_Pritsche_Concept_MAGMA_1987_frontleft_2008-03-28_A.jpg
Here is a good basic lowdown.
http://www.justacargeek.com/2010/05/1987-volkswagen-doka-syncro.html

Even more history on the Syncro in general. 
http://www.vwt2oc.com/View/syncro.aspx

Probably more VW than you ever wanted to know.   sorry I really like them.