You can also use an SN-95 style / Ford # F5CZ-54550A66-AA or equiv ...
Grabbed the Cargo Net out of my 2011 that I had originally bought when my 2004 was new. It is the kind that goes between 2 points, unlike the 2015-16 one that grabs 4 points right at the back of the trunk. I like this older style better as you can put bags, boxes, or a small cooler between it and the back of the trunk. I removed two tree rivets that hold the L & R trunk liners in place, installed threaded u-nuts, and then the 2004 style retainer hooks to hold the net.
Span is not as wide as the 2011 was, but the elastic is surprisingly still good enough that the net does not sag (see pics). Air pump (also from the 2011, that did not originally come with a temp spare) is tied into the left end of the net with a bungie cord.