I'm after the sound deadening cover that goes immediately behind the rear seat back on a classic. It is a dark grey rubbish material.

 

Is this the stuff that goes behind the seats on the JDM cars (in the photo below on the left), UK cars have split fold rear seats that are carpeted on the back (in the photo below on the right).
Be interested in what you can find as I just have the foam showing in the boot on mine from when I swapped from the folding seats to the STI seats.

 

It is a JDM Type R so no folding seats hence not easy to find, I have thrown they away in the past, typical that I can't find one now.