Were can i get a good quality rear Spoiler for my 94 WRX it needs to be large with brake light

 

Err, the ads on the bbs are a good starting point , alternatively:

Scoobysport
Scoobymania
Graham Goode

 

There is a small company in Japan that do some very good spoilers for the Impreza, I think they were called Subaru Technica International, or something like that...

You could look into getting genuine STI parts, but that would tend to be quite pricey! Scoobymania do the WRC style front bumper for around 400 squid, so maybe they could help...