Here's a pic of what I did for mine. Found the same color rear panel as the one I had. Then I hacked out the mounting points for the jack cover/ cup holder and fiberglassed over the open spaces left and covered it all with the somewhat matching carpet I used for the platform. Vi-O-La! Done. Although it does seem easier to use one that would bolt in, but I found this first and went with it.
Works for me.
ps - I'm debating about making the little notch under the lip into a rear area cargo light, but haven't had time or materials to do it yet. (Run it off the unused foglight switch perhaps...)