Duster Heater Motor

[T56MaxTorq]

Have a 73 Duster that has a/c, just not hooked up. I picked up the car and it didn't have a heater motor, just a blockoff plate - weird. So I'm looking for a motor online but nothing looks like it would fit the car. Any suggestions?

Here's what I'm working with:

 

[Dart_Doctor]

if i remember right one out of a dart is the same not sure tho hit me up if im right i mite an help ya

 

[RedFish]

The motor is mounted in a plate that bolts to the car so you'll need both. Actually fan too totals 3 parts.
I have it a 73 Valiant. Pm me if interested