I am slowly building a complete car using a mix of 3d scans and polygon modeling. This is a front caliper, two different wear levels of brake pads, all of the clips and consumables associated with brake maintenance, a rotor, and brake dust shield.
More info about my process in my polycount thead:
http://polycount.com/discussion/184167/development-log-building-a-complete-car-from-scans#latest
Caliper Marmoset Viewer