My Distinctive kit was made for a coupe, but can be made to work on a 'vert. They may have since come out with a 'vert kit, but I doubt it.
My carpet laid out such that it ran up onto the seat back just enough to lay on that little 1" wide shelf back there. You should find about five screw holes in that which I presume were for that cardboard separator that's shown in my Osborne manual. My car never had that separator. I bought a repop version and didn't like how it went in, so I left it out. But, I put screws through the carpet into those holes. It looks "factory".
For the well liner, I used spray adhesive and glued on some carpet to the back (visible) surface. It looks really neat. You can see it here:


The "carpet" doesn't match the trunk carpet exactly, but in real light it looks good.
One could spend alot more time carpeting their trunk than I did. The Distinctive kit is decent and a huge time-saver. With some effort, it can be made to look pretty good.