Judging from the pics of your cab I would get the cab media blasted to see the extent of the damage. That way you can see the big picture of the whole cab.
What I see in the pic that you need is these panels.
Outer cowl
From looking at your pics it does not look like you need the complete panel and its damaged at the lower section. I would not buy this and just make my own for the area that needs to be replaced. But you must be the judge of your own skill level this panel is 69.00 at Brothers Trucks you may find it cheaper on ebay or some other source.
Lower Hinge Pillar Pocket - Outer
Lower Door Hinge Inner Pocket
