Here I have for sale a Subaru Impreza WRX STI, After market Rear High level Spoiler
I think it's made by prodrive but not 100% sure.
It is painted in black but will highly recommend respray or you can wrap it which is cheaper and looks even better.The paint is scratched, dented and is peeling in places, you can see the worst ones in the pics...if you don't mind this you can just fit it like it is.

The brake light needs to be connected by a car electrician or you can do it if you have the knowledge.It has the wires but just need to use the plugs from the low level one and some electrical connections on the other end.
On a newage wrx will fit with no extra holes needed in the boot (will use the existing ones from the low level spoiler.
Collection from N London(Enfield) or you can arrange your own courier. (I can deliver for the cost of petrol) £200