wanted-- non ac heater box 1973 and up a body

Any luck finding the heater box? I have a decent complete unit from a 74 Duster, non-A/C car, but will need a new heater core, (tube ends kinked etc.) missing fresh air door latch, not sure blower motor works & cardboard cover on box is shot, otherwise works as it should & it's all there.
I will get pics. if interested.
$90+ shipping to you from 19030 zip code.