Try Tirerack. They don't list a front rotor for the 4.6is, but Luke there has been able to get a lot of stuff not listed on their site. (888)541-1777, ext 362 for Luke. He's a good guy and a die hard enthusiast.

http://www.tirerack.com/brakes/resul...ategory=Rotors

__________________
'04 E53, 4.4 Sport
'97 E39 528i
'86 911 Carrera, track car
'96 BMW R1100R