Can anyone Identify this MOPAR thermometer. Where does it mount?

Holly crap thats expensive!
yeah but that was maybe last NOS on this planet. The owner of this even more rare MOPAR logo unit, appears used? no mounting bracket may have a 300 dollar gift from a brother. I would be on ebay with it.
Drilling holes in my right door for a right mirror sooooo hard to do,
I sure as hell aint drilling holes in my drivers door for a thermometer. Good luck to all