Salute
A completely original Albatros DVa exists at the Smithsonian instititute. There is also AFAIK an original one at the Australian War Museum.
Smithsonian:

On the other hand, there is no original DIII in existence.
However:
a) A DIII cockpit would be very similar to the DV and DVa.
b) WWI Aircraft of the same type often had different cockpit layouts, especially if they were manufactured at a different workshop. (no mass production, remember... Henry Ford was yet to invent the assembly line)