Aww, just make your own with UVMapper, like I did.

1. Load the dragon OBJ into UVMapper.
2. Stare in horror at the convoluted mess.
3. Edit menu --> Select --> All
4. Hide selected facets: hotkey [
5. Be soothed by the nice, blank screen
6. Edit menu --> Select --> by Group (highlight the parts you want to see)
7. Unhide selected facets: hotkey ]
8. File menu --> Save Texture Map --> Exclude Hidden Facets

I've already painted a new transmap for the wings. It looked like a simple place to start.