I found in HandA there is a cargo cover for the 2001 and before, but holes have to be drilled to the panel to install. I wonder if it can be installed in the 2002 without drilling holes since it comes with several hooks behind the 3rd seat.
While not answering your question, I would like to recommend against getting the cargo cover (assuming that the current covers are the same for all Odyssey's post '99). Many on this board have expressed negative feelings about it. Just do a search for it on honda and aftermarket accessories topic.