Search ebay, subaru WRX S204 (06-07) lip, That is the 'aggressive' style with the canard things on the ends, there is also a flat style that I have had sitting in my closet for a few months now.
That...is one beautiful lip for the MSP. I'm surprised that this lip for the wrx fits the msp. I may be getting one for mine if it truly fits like the picture above. some Pictures can be deceiving, you know?