I would find someone really good with metal work and replace just that area.
Good metal workers can make the repair just about invisible
True enough, have known such craftsman in the past, but don't know anyone that good around here yet.
If I can at have a look at a bare panel that would help no end. A few choice photos and measurements is all one needs...
The other alternative is asking a US based wrecker to cut out and post those indented sections.
Anyone stateside able to recommend someone?