I’ll think you’ll also find the copywriter on that design is long expired, I would assume that they probably informed Porsche well ahead of release what they were planning.
There’s a guy in NZ Rod Tempero who will build you an exact nut to the last but and bold replica of pretty much any pre 1970’s Italian or British sports car, the manufacturers don’t appear to have a problem with that either, even Ferrari who clamp down on anyone haven’t done anything,
www.rodtempero.com