I have heard of at least one other 75% Fokker Dr1 in Oz but I'm not certain where it is. Andrew at TAVAS has a Dr1 but again, I'm not certain which version it is.
I am only in the early stages of my build. The rudder is done and my build partner and I will be starting the horizontal stab during the next week. We actually find its good therapy to get out into the workshop to build, but as you say, if you don't have the time, inclination or desire to build, then don't, you will just get frustrated.
Good luck with your search. I'll put out some feelers and if I hear of anything, I'll let you know.