RE: E-FLITE BLADE CP PRO
that is the same vertical fin that i have and its about $12. but i mounted mine to the daul motor mount not to the boom looks better.
Junktim
i would look at picking up the micro heli stainless steel spindal it the stuff it will take alot bigger hit then the e-flite one i have put mine in pretty hard about 4 times and still straight well worth the dollor more.