Suburban body part questions

[04ls1gto]

I am going to start collecting body parts for this upcoming winter's paint project.

-Drivers and passenger doors, who makes the best fitting ones?
-The previous owner really hacked up the rear quarter panels and my body guy suggest trying to find some complete units. PO used proper patch panels above wheel wells and cut to large then just Bondo the gaps. Has anyone tried using long or short bedside to repair?
- Also looking for rear sill section for hatch and tailgate, guessing knowbody makes a repop