I converted most of the VRML Johnson solids here from the NetLib database of polyhedra compiled by Andrew Hume. It is a useful database, and most of the files are in good shape, but as a caution to others who might wish to use it, I must mention that I ran across just a few omissions and errors in a couple of the files. I corrected these in producing the VRML files in the main body of this work:
I have not been able to get in contact with the author about updating the files.
Correct VRML versions of these polyhedra are included with my Johnson Solids. Versions of the original NetLib-format data files which I have corrected are also available here for anyone else who may want to use them as input to any software designed for the NetLib format: 66, 67, 68, 69, 70, 81, 108, 115. I only examined and changed the solid and vertex fields; I don't know if there are problems with any other fields.
Note that this is not meant as criticism. If anything this should emphasize the difficulty of the task, and the work that went into making all the correct files.