I recently had to sell my 2003 WRX to get a truck in order to pull the new family RV. Before I sold the car I removed my aftermarket stereo including a Audio Integration's "Perfect Fit" 10" sub box. I have no use for the box as its custom molded to fit the drivers side rear most corner of the trunk in the sedan.
It's been a great box and something I'm sure would make someone happy to add to their 02 - 04 WRX.
It's posted on EBay at: http://www.ebay.com/itm/320958329525?ssPageName=STRK:MESELX:IT&_trksid=p39 84.m1555.l2649#ht_500wt_1414[/URL]
or you can contact me directly if interested.