I've thought about using a GMT 800 door panel trim piece. It has a very similar shape to the 2nd gen GP. I bet it could be cut to fit and then glued on. That trim piece in those trucks is not as brittle as the ones in the 2nd gens.
I need to replace the one in my 2000 GTP. It has a crack in it, and I just glued it back on to fix it temporarily.
Hey, I’m pretty new to the car community in general. This is my first car, bought and paid for on my own. It’s in pretty nice condition, only 116k on the clock. A pretty nice oil leak and a tire that goes flat but other than that pretty much no issues.