748F3 AA400
748F0 AA400
748F2 AA400
748F1 AA400
These are the four fin numbers from a V-spec II the diffusers from the v-spec and v-spec II had very slight differences i think nissan contracted a different company to supply the 2nd edition of rear diffusers from october 2000 for the v-spec II , i have priced the fins several years ago from the local nissan dealer off the top of my head around $150-160 a fin so $600 plus for the four not cheap.
Their is a company "Gratz" that does copies of the entire front and rear diffuser and sells the fins seperatly i have a set, you can get them off yahoo japan i think i paid about $80 for the set much cheaper option