Options to repair or replace driver's side fresh air vent door.

The driver's side fresh air vent door hinge is broken on my 1965 Dart. Looks like the bottom hinge rusted shut and it broke the hinge bracket off at the bottom when someone tried to force it open. The vent box itself is in pretty good shape. I could reuse the duct if I punch out the rivets and replace or repair the door. I've even got new gaskets.

Any advice from someone that has repaired one of these doors with replacement hinges? Or maybe someone has a non-broken door or even a whole duct assembly they'd be willing to part with?

Thanks!

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