I've just bought a 2004 WRX with an aftermarket rear bumper with integrated diffuser. As I'm getting a bit too old for the bodykit look, I'm willling to swap it for the standard item, if anyone of you has a blue 2004+ impreza (TS or WRX, think its the same) and is looking to customise.
Its in as new condition so would need the standard item to be in good shape too.
Will post pictures soon as I figure out how...