I think there are Sure Electronics displays that use that same HT1632C drive chip. Pretty sure you can work out something from their documentation.
There's even an arduino page on it in the playground
http://arduino.cc/playground/Main/HT1632C
Manufacturer's data sheet found here
http://www.holtek.com/english/docum/consumer/1632c.htm
I see several hits at www.adafruit.com also