Well welcome to GPF,
I believe that it is about the same to get a set from a autostore or from one of the vendors, but the cheapest way would be at a junkyard, I would suggest 99+ just cause the car sat in the junkyard the least possible amount of time, but there are other parts needed... but the stainless brake lines can be purchased on e-bay(if you do a search, there was a whole thread on them).... Ir you buy the rotors from anyone other than the vendors I believe it is for a 2000+ monte carlo for the 12" rotors (11.9 to be exact)
For more info check the threads in the suspension section, or post more questions if you cant find your answers
