I am using 03 46mm YZ forks. From what I understand, wheels, axle and brakes are the same up to 07. The fork diameter changed around 04 to 48mm so the triple clamps are different.
All that to say the axle and the brake hangers would be the same.
If your using the 46mm forks, we can even try to get a better price on the springs since they too are one off specials.