Dude, you are seriously brilliant! I didn't fully understand what you were saying at first. I had no idea there could be multiple UV maps!
I started by examing the model in iClone and could see there was just a single texture.
So I re-exported it to FBX then used your Blender addon to import it.
I then selected the mesh, went to the Object Data Properties, opened the UV Maps section and noticed the 3 different channels. All I had to do was to activate Channel 1 and presto! The correct texture map was used.
So you simultaneously solved my problem AND taught me something important about Blender! I can't thank you enough!
- Jeff
The Adventures of Capt Sanchez
Cybernautic Studios