JL-Motoring has great looking product for under 500 bucks. My buddy ordered their GTS style lip and I must say that it does the job. You probably wouldn't be able to tell the difference really since most the high priced brands label their authenticity on the back side so it's never seen anyways. I ordered the front lip, rear diffuser, and M performance trunk lip from them for 1200 shipped. The front lip is a Akrym replica and the rear diffuser is the Vorsteiner replica. The stuff looks great from what all my buddies around here have from them.
http://www.jl-motoring.com/category_s/73.htm