I searched google and found loads after a couple of searches...
Try searching for 06 lancer sport instead of 07...07 was the year change to the new model Lancer.
If you're in Glasgow, get yourself along on the 27th to the Showcase meet...it's one of the bigger meets of the year Skyline owners, MLR, Clan Japan, Chasing 7, and a few other clubs/ forums will be attending...
K&N do panel filters for your car... I'd look at a full stainless induction kit with a pipe that replaces the airbox will make noise and gain a bit of power/ response... But get reading, learn what you can about your 2.0l engine and what others have learned. American forums are a wealth of information, over here your car is quite rare, the American market is so much bigger they'll no doubt have a good section for lancers and not just Evos on some of the forums.