December 2019 Update
I've learned that he full set of gasket files never got restored. I've done a fresh upload (see below).
For anyone about to begin this job, I'd suggest that you use consider a more dense foam sheet than what you'll see in my pictures. That stuff was perhaps a little too soft (although it did replicate the OE material pretty well). For a lot of the straight-forward butt joints, there's a semi-closed-cell neoprene sheet that might be a better choice. You can buy it in 8-12" x 11" sheets at craft stores like MIchael's. It's available in two different thicknesses (1/32" and 1/16", IIRC) and comes with adhesive backing on one side. Very convenient.
There are many other places where the softer foam is still the only way to go. Common sense will usually tell you which ones require the softer stuff. Unfortunately, the finicky little pieces that go inside the centre front ventilator duct is one of those locations. in that location, the foam is used to reduce airflow noise, so it has to be open cell. You'll like the end result, but you won't enjoy the path to get there.
240Z Series 1 - HVAC Gaskets - Blower Motor & Fan Mounting Plate-to-Blower Housing join.pdf
240Z Series 1 - HVAC Gaskets - Air Box Ventilator (plastic tri-outlet manifold)-to-Centre Ventilator Duct.pdf
240Z Series 1 - HVAC Gaskets - Centre Front Ventilator Duct (plenum lining).pdf
240Z Series 1 - HVAC Gaskets - Cowl (underside)-to-Intake Compartment.pdf
240Z Series 1 - HVAC Gaskets - Duct Connection Flanges.pdf
240Z Series 1 - HVAC Gaskets - Heater Box Air Inlet Flange (for plastic duct from Blower outlet).pdf
240Z Series 1 - HVAC Gaskets - Heater Box Floor Vent Control Flap lining.pdf
240Z Series 1 - HVAC Gaskets - Heater Box Outlet Control Flap lining (heat-vent-defrost control).pdf
240Z Series 1 - HVAC Gaskets - Heater Core Header Tank & Lines.pdf
240Z Series 1 - HVAC Gaskets - Intake Compartment Diverter Flap lining (fresh-recirculate control).pdf
240Z Series 1 - HVAC Gaskets - Intake Compartment-to-Blower Housing join.pdf