Porsche wanted a Typ 64 so bad... they made one themselves!! One is on display at the Porsche Museum in Zuffenhausen. The car isn't finished but you can see the car's "bones".
The Typ. 64 was built to race in the Berlin to Rome race in the fall of 1939. However the invasion of Poland squashed those plans. And the out break of WWII.
Dack