1985 A/C & Heater Box (Plenum) needed...

[TruperTim]

I am in need of a vent piece for my 1985. It is the piece that is part of the vent assembly that attaches to the back of the dash shell. I need the lower box part that, when the dash is installed back into the car - mates up to the heater core blower box that is mounted to the firewall...

Please see photo attached. The top photo shows the piece I am missing. Bottom photo shows my dash without that piece...

Can anyone spare this part??? I need it to put my dash back together and reinstall into the car.

(There is a difference between "A/C" plenum and "non-A/C"... I need one for an A/C dash...)

Thanks, Tim