Just installed a new trunk kit, courtesy of http://jarheadbobandmax.com/ :
Panels are posterboard/chloroplast material, water resistant with pretty nice carpeting too, thicker. The lower section didn't require anything besides some minor pushing into place and adjusting for proper fitment. The upper panel did require 4 holes to be drilled and uses plastic pushpins to hold it up. You might be able to make a magnet or double sided tape work especially if you just put it up for shows. Since my car isn't a low mile original I didn't mind too much and being black even with it off, they don't stick out.
That's about it for my mods on the year . So far at least.