I believe there is a D.III at Rhinebeck, built by Cole in 1969 (according to ORA website). Swanson built a D.IV replica in the 1979/1981 time frame. I have six pictures of this one. This one:
Image:Airforce Museum Berlin-Gatow 304.JPG - Wikipedia, the free encyclopedia
looks identical to the pics I have, so it may be the same aircraft.