Where can I get one from?
and which of the following would you recommend as a setup?

(background info=currently have a wrx sti version iv type-r coupe, monster exhaust, monster filter, 16" jap silver speedlines)

setup a) blitz induction kit, mongoose downpipe, scoobysport mid section, monster exhaust

setup b) blitz induction kit, scoobysport downpipe, scoobysport midsection, monster exhaust.