I think my doors are two different years...

Interesting idea, thanks for the suggestion. Can the clips be removed from the cardboard panel without damaging it?

One possible problem though - the trim panel would need to be "stuck" directly to the door, so that area would not be protected by the vapor barrier.

I plan to coat the edges of the holes to prevent rust, if I do drill them.

Where in MO are you? :)
Sorry I thought we were talking about the chrome belt moulding trim on top outside of the door for the 3m tape idea.