With all the effort and skill i see poured in to making perfect recreations of the BTTF cars, I'm surprised no one has made a similar effort to try to recreate the original prototype cars. The fascias are a little edgier, and the brown interior I think complements the car well, and the seats look amazing. Personally, I like the look better than the production cars.
Well its not really plausible using a production DeLorean, there are so many differences that you might as well start from scratch or with an actual mid-engine car such as a Fiero. Someone really have to love the shape of the original prototype to go through all that effort.
I dont think Proto 1 and BTTF replicas are comparable. A BTTF car is (for the most part) a DeLorean with more stuff on it. The prototype car uses a different 4 cylinder engine mounted transversely, in front of the rear axle. You'd honestly probably have an easier time trying to turn a Fiero into a Proto 1 replica than a production DeLorean into one.