I have some of the interior plastic stuff also. The pillar trim pieces that are next to the windshield are available new now, but in black only. The parts I have yet are the rear door post plastic pieces, in green. They go from the rear floor, up & around the doorway.
The stainless steel trim on the top of the tail gate is mostly impossible to find, at least a new one is. Maybe you can find a used one without too many dings in it.
the trim on the tailgate is completely gone off of mine. so even a banged up one would look better. i am trying to find a fourth generation elky in a salvage but i have only found a couple fifth generations