I found these online. They are the Sunl sl150t27 spider. It is a three wheeled reverse trike registerable in 49 states with a 150cc scooter motor. It only sells for 3000 dollars. Looks like it would make a wonderful conversion, Kelly sells 13" motorhub wheels rated at 130 kph that is the exact same size as the one on the back of this trike.
What do you guys think? Is there anything that would make this more complicated?