Where to find metal nitrous crackers?

I've searched on the net fora good three hours or so, but haven't been able to find any vendor with metal crackers. Anyone know of a good one? Thanks in advance.

I haven't found any in a few years, either. All I can get are the crappy plastic ones. They still do the trick, though.

I may still have an aluminum one floating around somewhere. I would give it to you, but if I ran across it, I would be compelled to use it for myself.

MUWAHAHAHA!!