Surgical intruments boxes? Like these:
http://www.worldmedicaldent.com/instruments_box1.htm

The website belongs to a pakistani company, and they need BIG orders. A little out of my league. I've seen the plastic Flambaue cases that are the same size as these, but I really like metal. These strike me as a bit more robust than a mint tin.
_________________________
-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.