If you want a simple upgrade, go to RockAuto and get the Olds Intrigue JA9 upgrade kit. This will put 12" rotors on the front with stock calipers. You'll get new calipers, caliper brackets and rotors, and pads.

http://www.rockauto.com/en/moreinfo....sn=437&jsn=437

or piece together your own with the rotors and bracket piece parts.