there are none that are made specificly for your car, but anything for a wrx will fit, however, you will have flange issues where it connects to the cat, if you have access to a welder or someone who can cut and weld that can easily be over-come. Right now i have an invidia cat-back on my 96 impreza, connecting it to my custom downpipe. all the hangers work properly and didnt have to be modified.
http://www.mnsubaru.com/forums/showthread.php?t=29682&highlight=borla that will fit. great exhaust. i own it. i also have the headers too. mmm rumblez