I haven't seen the boards being mentioned here although I think they look nicer than what I use. Will stick to what I use though as it is cheap (free)- I collect used bolt boards from my LQS and cut them in half as they are too long otherwise, tape the cut ends up and presto, I have bolt holders. Doing things this way I don't get as much fabric in the shelves as I would if I folded like yours but am happier anyway as it is easier to pull them out keeping the rest tidy.
Maybe1day