All of the panels are available for this repair. I think some people cut out too much at one time and it gets overwhelming. I laid out my panels carefully, cut my way in and welded my way out, I did not sacrifice good OEM metal. The panels are usually bigger than the needed repair, if the old material is good I left it. The panels are also just close and require sometimes extensive hand fitting. I would check door fit before fully welding any seams. The floor needs to go back in first as it involves the cab mount and must be true, then the inner cowl, I added some of my own reinforcement internally before closing it all up. The thing to also check and address is the hinge pockets and cage nuts, if they are damaged during reassembly they are nearly impossible to fix correctly once closed up. Take it slow, measure three times, get someone to assist as another set of eyes and ideas can help.
