*edit* I didn't notice you had a '12. The following may still apply though. They do have some parts for 12's on these sites. *end edit*
Whoa, I can't believe no one has said FSwerks yet! If they don't have it... You don't need it!!! lol. :P
And whatever they don't have there, either Central Florida Motorsports or Andy's Auto will have. I've spent hours on all of those sites. Auto Anything and Rock Auto are good for OEM parts and brakes and stuff. Then there's TireRack for wheels, tires, suspension, brakes... Check steeda too. They have some stuff for the newer foci I believe.
And that's where the rest of my internet time that isn't spent here goes!
ROTM June '13, PNW Crew #42, SR #245, Rally Rev #02