Went to Autozone and they didn't list any part numbers for door panel retainers. So eyeballing the panel pieces they had in stock, I picked up part number 963-005. It worked for replacing the white clips on the doors (I broke one). I think they are a better clip also.

Just thought I'd share before you spend time at the dealership :)

Thanks for sharing. I've added it to my G8 Word document. Now if we could just find a more common alternator and fuel pump!