I'd still contend that the 98-02 Trans Am/ Camaro front brakes would be dramatically cheaper than any aftermarket brake kit with a 12" vented rotor.
You can buy the cross drilled rotors with Ceramic pads for $57.59 shipped. (These are pretty decent rotors, I've used the same brand on a few 79-04 mustangs with no issues)
http://www.ebay.com/itm/A0263-2-Front-Cross-Drilled-Brake-Rotors-and-4-Pads-Chevy-/261332411829?fits=Year:2002|Model:Camaro&hash=item3cd8a025b5:g:yZ8AAOSwT6pVznxH&vxp=mtr
You'd have $235 in the hubs and caliper brackets, (and reuse your existing wheel bearings if you wanted)
http://www.flynbye.com/catalog/i281.html
A pair of remanufactured caliper and housing assemblies with new hardware would cost $188.42 shipped.
http://www.ebay.com/itm/Disc-Brake-Caliper-Premium-Semi-Loaded-Caliper-Housing-and-Bracket-Front-Right-/401058484220?fits=Year:2002|Model:Camaro&hash=item5d60f2cffc:g:CRkAAOSw5dNWoMxl&vxp=mtr
Thats a total of $481.01 for everything new without needing to step a foot into a junkyard. (Could probably be done even cheaper if you got the caliper assembly from pick-n-pull)
Another benefit is the fact you can buy wheel bearings, rotors, and pads at Autozone etc.
Here's a picture of the same brand rotors on my '92 notchback. I'm a dumpster diver, so the calipers and pads are junkyard stuff that I cleaned up. FWIW the caliper on this is virtually identical to the 98-02 f-body. (I think they will even interchange) The point is that the rotor and caliper are essentially Identical to the parts you could swap onto a G-Body for under 500 bucks.
EDIT: I'd also mention that if you wait until a holiday most pick-n-pull yards have half-price days and you could probably get EVERYTHING out the door, Calipers, Brackets, Pads, Rotors for under $100. All 98-02 cars had the same brakes whether it was a v6 or a Ram-Air trans am. There are plenty of v6 cars in the junkyards, so none of the parts here would be stuff that's really hard to find. In that case you'd probably only have around $325 bucks in the whole setup.