measuring 99 front hubs and rotors

My 99 is developing a bad wheel bearing, so I need a hub. No problem there, except that it's a 99, which means it could have either cast or composite rotors. No problem there if you look and find composites, but if you look and find cast, you have no way of knowing if they're OEM cast or aftermarket cast to the dimensions of composite. I find mine are cast, but I got it at 144K miles, and the rotors may not be original.

So....Does anyone here have the actual measurements of either the rotor or the hub itself for quick reference? Or does anyone know if there's a date or serial number pivot point by which one can make an educated guess which I have?

http://naxja.org/forum/showthread.php?t=1058413 in the faq's

Thanks. I thought there was something like that but I didn't have luck with the search. Exactly what I need.