I am making a start trying to fix the damage to the rear of my camper that has been bodged.
I bought it knowing it would need this done, but I would appreciate your advice on the best way to go about sourcing the parts. I need the below parts marked with red arrows. Although visible on the JK diagram, the parts do not appear to be listed for sale? Any idea why?

Also, where the van has been driven into, the very back flat panel that meets the tailgate and will have the tailgate seal attached is completely mangled. This has been hammered almost flat where the lip should be! Will the above panel (long horizontal panel above) include the lip that houses the tailgate seal and lock? I can see on the back of my van where this panel has been joined (middle of engine opening), but can't tell whether this is one piece all the way to where the tailgates closes against it. Again, any ideas why this is not listed as available?
Would I need to find a van to cut these parts out of (with the owner's permission of course

Hopefully the above makes sense!!
You help would be much appreciated.

Rob