Shady1: For your front fender & door side trim pieces, keep watching Ebay. These items frequently show up there. By the way, these are stainless pieces and you can polish them yourself. Use wet/dry sandpaper. Depending on the existing scratches, start with 600 (for worse case) or 800. Keep the paper wet. (I used a small bowl for the water but take care to clean the bowl & use fresh water with each change of paper grade) Sand out the existing scratches. Then graduate to 1000, 1500, and 2000 (in turn). Apply the successive grades just to remove scratches from the previous coarser grade. Rinse off the piece being polished before changing to the next grade paper so the residue from the previous (coarser) paper will not be carried over. After the 2000, final polish the item with Mothers paste polish. Done with care the pieces should turn out looking like new.
The aluminum trim items are more of a problem. On other boards some have covered polishing alum. trim. Try the PY board. Do a search.
The qtr. panel 'bullets' are chrome plated "pot metal" and are subject to pitting. You have only three choices: NOS, NORS, or replating. All are expensive. The only alternative is to luck across used pieces that are acceptable to you.