I would say B/S
If this means BULLSHIT, I agree.
VW Motorsport apex strips have different dimensions to normal strips we use in regular G40/G60-chargers, because the VWM Gr. A cars had been equipped with fully modified G60-chargers. Anybody saying, this strips are made by VWM is a liar or doen'nt know it better (should not sell charger parts in this case). In addition: NAK seals are no genuine parts. And Klüber grease you get in any sanitarily trade shop.
"earlier original strips shrunk": they never did. The old strips (nearly black in colour) had more lifetime than the later, SINTIMID8000 ones. But they've been more abrasive than the newer ones with more PTFE within the compound.