If you have a sliding back window you may already have this taken care of. If you do not you might want to read on.
I've not dealt with a Ranger in regards to broken handles but this is a common problem with old Volvo 200 series, which I had to break into in order to open a door. The handles are very similar in design, with you having to pull the handle up in order to disengage the latch that holds the door closed. If you lift the handle all of the way up, look under the handle and you should be able to see a metal rod that is about 1/8" thick. Try reaching under the handle with a pair of needle-nose pliers (needle-nose vise grips if you have them) and grasp the rod. Depending on how Ford engineers set up the system, you then either need to pull up on the rod or push down to disengage the latch. It helps to push in on the outside of the door itself to take a bit of the pressure off of the latch.
As you will see, it is a simple yet effective design. I wish you luck and hope that you do not have to do this out in the cold.