you are talking about the plastic heelgaurds, not the metal floorboards ?
I don't believe either changed from pre 03 to 03-06,
only the ..... front hood/headlight, TORS/CDI unit, 4 versus 5 wire stator, hydro brakes and corresponding parts for them, and frame tabs for hood/brakes/cdi, changed.
everything else is the same and interchangeable.