Air recirculation door spring...thinking out loud...

[Gerard]

Hi!

I'm thinking out loud here on this one.

The spring between the vent doors on the A/C on my Audi 200 is broken.
It is so broken that it is missing. I'm going to have to get another
spring in there to connect the upper and lower doors.

But... and here is where I'm probably being silly... why use a spring
that might break again? I was thinking of perhaps a plastic or light
alloy connecting rod to connect the doors together. Would this be silly?
What would stop one from trying to fit a strip of plastic between the 2
doors. Is it perhaps too cramped an area to do something like this?

G.