Hi Willi,
I have seen the strands of hair from MvR and have been very tempted to bid on them. I really want to believe that they are authentic, but it's very difficult to not be doubtful of course. The Albatros D.Va fabric is almost certainly authentic. It should be from the restoration of the National Air and Space Museum's Albatros D.Va. The NASM cut most or all of it up and sold it off, as they did with the plywood covering of the fuselage. I wish they had kept the fabric and the plywood skin in large pieces as museum relics.
Regards,
David.