Hi Wim
I would be very interested in a set of RB footpeg rubbers, however currently I use CX500 Turbo footpegs and rubbers on my RB which I am very happy with. I think these look so close to the original Honda items it would only be an expert could tell the difference.
Have you thought of making rear RC/RD footpeg rubbers? These are used on many Hondas and I think there may be more interest.
Keep up the good work
Trev