I'm not sure this is the spot to post this request, what the parts are called, and whether or not they are available aftermarket. I'm embarrassed.
I have a '71 Oldsmobile Cutlass Supreme convertible. The car has factory air. I removed the valance on the passenger's side and a 2" diameter (approximate diameter) hose connecting the valance to a male fitting broke into pieces. Also, I removed the driver's side valance. Behind the valance is a plastic plenum?? that is cracked. This part has a rectangular female fitting that slides onto another piece behind my console and has a smaller rectangular male fitting that attaches to a rectangular hose.
An exploded parts diagram will be helpful for identification . Are these parts available from a member or aftermarket.
I did my best describing both parts. Thank you. Fyi: I'm located in beautiful Philly....

 

I have all of the HVAC pieces that you need. Email me and I'll send you a diagram. Thanks, Bob.

 

Driver's side (see attached).

Passenger side (see attached).

Passenger side hose.


Passenger side hose, double female.
Passenger side hose (see attached)

I have no idea what they are called. Duct? Plenum?

I hope this helps. An exploded view of the HVAC components behind the dash will be beneficial.

Thank you.

 

Diagrams sent.