i wouldnt get a cone it will just soak loads of hot air. Id get a new air box and a panel filter the maybe removed the current intake pipe n feed some flexi pipe into the passenger wing (theres a useful hole there)
or
make up some sort of short ram kit yyou need a 90degree silicon bend, some metal pipe work (im going to be getting a local guy to make me one) you can get stuff off
ebay but will need extra bits of pipe as its not very long then bolt a filter on the end
or even easier but less custom
Focus 2.0l intakes fit the sri's but you usually need to import them (i think) have a search on ebay
Anyone correct me if im wrong im going from memory here