LA: Radiant Images:
http://radiantimages.com/index.php/cameras/hd-beyond/silicon-imaging
OC: Gear Monkey:
http://www.gearmonkey.tv/shop/si2k-silicon-imaging-camera-system-p-798-c-1_22.html
Canada: William F. White:
http://www.whites.com/
Canada: 3DCC:
http://www.3dcameracompany.com/3d-camera-systems/si-2k-hawkeye/