In case anyone with a 2009 base model wants to add this, you don't have to buy the entire panels. I just replaced my panels yesterday (because I got a REAL good deal) and found out that there are outlines on the speaker panels that can be cut out to add the bracket as well as on the bottom piece on the rear deck lid. You can buy all of the pieces for appr. $80 plus the touneau cover (which I also got a REAL good deal on
).
If anyone is interested, I can post pictures of the outlines as well as the parts needed.