Don't let them bug you too much. I know you didn't ask for opinions but they will give them anyway. It isn't bad looking at all. I hope you find your answer. Several months ago I saw one on a 986 body kit advertised on Ebay that was somewhat similar. I messaged the seller and asked about the wing on the car pictured. He said it was from Germany and cost about $900.
Porsche 986 Boxster to 997 GT3 update Rear bumper | eBay