Not a bug in this mod but YUPDate changes how the vendortron works giving it a new faction that gets overwritten by the new faction from this mod with the result that it doesn't have any of the unique gra guns in stock. An easy fix in xedit to copy over the faction from yupdate to this mod and not something for the mod authors to change necessarily. I just thought I would post this here incase anyone else was having the same problem I was.
Thanks for the great mod.