The high end Porsche ones are cast that way, and then drilled to finish them up. You won't likely find rotors for the X5 that are cast with holes, as they are all using inexpensive blanks and then drilling them.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue