Yes they did. I have a practically brand new one with Wire harnesse. Well the car had 16k miles on it if I remember correctly Pm if you'd like it. .
I also have a complete unit from a 74 Maverick. Includes the wiring harness, heater control switch and faceplate (no broken pins) with rear defroster switch. Tan in color. PM me for pictures if interested
Just to let you know, they call them defrosters but all they do is blow air on your back window. There is no heating element. They do help somewhat but dont expect a lot.
Nothing like the modern style. You can install that style aftermarket. I had one installed like that on a Ford Festiva I once owned.