Forget part numbers - most eBay listings dont have part numbers and if they do, they are inaccurate - if you and I cant' find the damn part number (and we cant) how can the seller do so?

"Crossfire Trunk Trim" or "Crossfire Boot Trim" or "Crossfire trunk inner lining" would be good search terms.
If you are on Facebook, there are many of us who have parts cars who can probably help. I keep encouraging people to use the forum, but they say it's "too hard to use".
Nothing I can say in response to that, other than, "Way easier than Facebook".