While I don't have time to read and give your question the consideration it
deserves right now, off the top of my head:

1. Go to a craft store and buy a sheet of hobby foam of the correct
thickeness, about a sixteenth.

2. Pry off the metal clip plate from the row of buttons molded into the
flaps.

3. Place an oversized piece of foam on the row of buttons on each flap, and
press the plat back on to the button, trapping the foam as was originally
done when the car was made. No need for glue.

4. Take a pair of scissors and trim the foam flush where it needs to be
flush, and overhanging where it needs to go beyond the edge of the flap.
Careful observation, playing around and thinking about the problem will
have to do if your existing seals are too deteriorated to copy.

5. Reassemble.

Jim

On Mon, Dec 10, 2012 at 12:21 PM, Mike South <msouth@gmail.com> wrote:

> It looks to me like the heater flaps are constructed with a metal base into
> which a plastic rectangle was pressed, the foam seal being held between the
> plastic and the metal (don't know if the foam was stuck to the plastic or
> just held in place by it).  Should I
>
> (a) leave the plastic there, and stick my foam to the plastic?
>
> (b) remove the plastic and stick my foam to the metal?
>
> (c) remove the plastic, put my foam in, stick the plastic back on?
>
> mike
>