Dohc 4door Rye

today i put my car up on the lift for the first time to do a oil change and tire rotation and for christmas im getting a cat back exhaust and i noticed cat, downpipe, and catback flanges are really badly rusted almost to the point if i tap it with a hammer it will crack so i plan on getting new headers and cat to match the catback but i can't actually find any cats.... i don't want race headers because this is my daily driver and i don't want oem crap cause its just to expensive and aftermarket is about same price and better... the catback im getting is megan racing...not the best but i really hate having a silent car 8P anyone know any desent headers? or even know of any high flo cats for the ep3? the only thing i ever seen for cats is ebay and i don't trust them due to the fact 99% of em are test pipes

thank you for you help
-Rye