I've been looking for 30 years. I am really good at finding the odd ball stuff as well. Short answer, NO. You are not going to find it. Ranger/BroncoII are large systems with a significant underhood and under dash footprint. The big problem is there is not room between the dash and the firewall, there just isn't room for anything that can flow a lot of air. And so many systems have a large underhood footprint (usually the evaporator case) that there just isn't any room for.
If you ever get in a gutted Bronco shell, it isn't much larger than a complete Bronco. Very little room is taken up by the dash. A modern car with a complete in car HVAC system, take it out up to the firewall and it is amazing how huge the cabin suddenly is. That cockpit module (dash, glovebox, HVAC, cross car beam, ductwork, etc.) takes a massive amount of room.