I'm going to port your head to let some of the air out.
Lets not use the word port for your application, lets just call it a hole or relief hole.
Like I said before there is a already a hole in the trunk, in the passenger side, for relieving pressure from closing your door to temperature changes. Soooo putting another hole in the trunk is not going to fix anything. Unlike the pictures that YALEROYNOT posted your trunk rods should have 3 holes to pick from, moving the rods up will push up harder on the trunk lid, making the lid stiffer. Now that added with some d-mat should remove the rattle. As for my'n I move my rods up one hole, I have no d-mat, I hit 137.3db, and have no rattles from the trunk. For some reason I don't think you are hitting 137 db, try moving the rods. Moving the rods will take a strong arm and some playing with it but its doable.
Shit, I knew there was a good reason why Ryan did not have anything to say but every time I don't follow advice that I've gotten from him in the past I end up kicking myself in the ass.