Yes, it's John's work (as noted above). He and the rest of the team that created the model have complete control over the IP content they created.
I wasn't planing on ever releasing my example of what might be done (there are several model differences if you look at the photos), but was hoping that Alcanallen would see that it's reasonably simple to create for himself what he's requesting if you have a reasonably close starting point, and an evening to put into it.