I have a rear flat, fold out, cargo floor for a QC. I was told it was from an '06, but I believe it will fit all the 3rd Gens. I never got around to installing it on my truck ('04). It is the one with carpet on the top. The bottom side of it has some minor scratches. It is for the 60/40 rear seat, butyou could probably install iton the full bench with some minor modification. $140 plus shipping.

Here's some pics:

 

Is floor still available?