I got the part numbers for you from realoem.com and they are identical according to them now let us know where you scored the aftermarket axles
e85 z4m
http://www.realoem.com/bmw/showparts...48&hg=33&fg=25
e46m3
http://www.realoem.com/bmw/showparts...89&hg=33&fg=25
__________________
F80 m3, 997 gt3, 14 ram ctd, f15 x5, drz400sm
Gone:z4m, boss 302, c6 z06, m6,z3m