You'd need to replace the front fenders and bumper at the very least to make it work. All those pieces are different from Mazdaspeed3 to Mazda3. My finacee has an '09 3 and it's pretty noticeable when her car is parked next to mine
and even after you change the hood and fenders the body lines on the doors wouldn't line up, then you wwould have to change them, and then the rear quater panels wouldn't line up.. so yeah pretty much out of luck there