You could put a used door and fender on it.
Call around and try to get the right color if at all possible.
This will save you the need to trim it out and to paint it at all.
At that point you could do one of two things. Take it to a body shop and have them straighten the rocker panel or leave the rocker panel as is and sell with much less cosmetic damage than it has now.
This scenario is only truly ideal if you can get the correct color used parts though.