I NEED A REAR CARGO COVER

I AM TRYING TO FIND A REAR CARGO COVER THAT FITS IN BETWEEN THE REAR SEAT AND THE REAR DOOR OF MY 4RUNNER. IT WOULD COVER STUFF UNDERNEATH THE COVER LIKE A TONNEAU COVER ON A TRUCK. I HAVE SEEN THEM IN AFTERMARKET CATALOGS, BUT I NEED IT TO MATCH MY INTERIOR, WHICH IS BEIGE OR LIGHT BROWN. ANY INFO WOULD BE GREATLY APPRECIATED.
THANK YOU,
KARL