I'm looking to obtain some of those heat-resistant curtains like they use between zones in a reflow oven, or in nitrogen inert wave soldering applications.

Only thing is, I don't even know where to look. The best I can find is companies offering nitrogen retrofit kits, which I don't need. I just need the curtains!

Any suggestions, folks?

I can't help off hand, but have you asked the manufacturer of your equipment?