Is this spoiler from the factory ?

F.Y.I.
This is a e-mail I received from AAR Quality Fiberglass Reproduction on the ducktail type spoiler,
Good morning,
Actually we just finished a mold for that kind of spoiler. The only difference is that you use only 4 bolts to attach it. It runs $250 plus S & H.
Sincerely,
Pia
AAR