Correct. Unfortunately, I've been unable to locate a digitized copy of B online
As far as I know, we are in a similar state for DRN's Codex Oblongus and Codex Quadratus (the University of Leiden has held both since 1690). Pictures of a few pages of each are available, but not the whole of either. A weekend in Holland with access and a quality camera could solve the issue! There is the "Codex Vossianus oblongus phototypice editus" from 1908 which was a similar attempt, but I have never seen any version of it available.