Expensive [yes], but not often found.
https://www.ebay.com/itm/Nos-1980-Ford-Truck-Auto-Transmission-Indicator-EOTZ-7A110-B/293675207364?hash=item4460680ac4:g:my8AAOSw6WxfKCa3
Very good price.
https://www.ebay.com/itm/80-81-82-83-84-85-86-F100-F250-F350-BRONCO-E0TZ-17255-C-SPEEDOMETER-ASSEMBLY/283949429857?hash=item421cb47461:g:PQYAAOSwOBBfD3rQ
Looks like XLS; has horns on pad like for vans; expensive!
https://www.ebay.com/itm/NOS-1982-86-FORD-F-150-HORN-BUTTON-BRONCO-XLS/373136232529?epid=1530984198&hash=item56e0a71051:g:cGUAAOSwxipfKBbb
For the smoke test, I used the small vacuum line which normally connected to the temperature sensor in the air cleaner. The air cleaner was removed so that the carburetor throat could be sealed [i used duct tape].
If this is the correct part [has an extra A at the end], then you could buy 5 Dormans.
https://www.ebay.com/itm/FORD-OEM-E-350-Econoline-Club-Wagon-Engine-Coolant-Thermostat-Housing-F5TZ8592AA/392798289199
I found this, but it is listed as: E87H-19808-AA. It is listed as being for Bronco 11 and Ranger.
https://www.ebay.com/itm/87-88-Ford-Bronco-II-Ranger-Truck-Heater-Control-W-AC-OEM-PART-E87H-19808-AA-/202807759656
Hmmm, this reminded me of the attack on Pearl Harbor and what statement has been attributed to Isoroku Yamamoto... "I fear all we have done is to awaken a sleeping giant".
The mighty 460 will soon awaken!