In the fall of 2002 for my 2002 Z06 I purchased the following from West Coast Corvettes:
Black 3 piece rear compartment covers - Part # WCC622. $149.00
Black (with "Z06 - 405 hp" logo) Lloyd Cargo Mat to cover rear compartment WCC623 - Part # Customized 3153A. $109.95. Note this is a "convertible" cut mat to cover the entire back end of the Z06. A "coupe" mat has some cutouts (I think I remember this fact correctly) to hold the targa top to the floor of the coupe when you take the top off.
Black (with "Z06 - 405 hp" logo) Pair of Lloyd front floor mats - Part # 3143. $72.95
Plus Shipping and Handling.
I have also added a "Cargo Net" and a flip out "Padded Apron" to cover my paint when I load the trunk of the Z06. Both of these hook to the factory installed clips in the trunk of the Z06. I really love the setup.
I purchased the “Rear Bumper Apron” from "C5 Creations" at the Knoxville, TN. Corvette Show. They always bring some Corvettes with all the items they sell installed on them so you can check them out at the show. The “Trunk Cargo Net” is a stock GM one, mine came out of a 2003 mid-size Buick.
I installed the Cargo Net first with the Rear Bumper Apron on top of it so when I flip out the Apron to protect the paint the cargo net is ready to accept numerous small items you do not want flying around the Z06. When the Apron folds back in the trunk it covers the cargo net and keeps it out of sight.