source of black curtains for fluorescence microscopy?

[James Bassuk]

I have 2 choices: darken the entire room up with a black curtain hung at
the window, or rig up a track where a black curtain hangs at the
microscopy table.  I prefer the latter, but hesitate to spend the time to
design and have it custom-built.

Is there a supplier?

Thanks in advance,
Jim Bassuk
U Washington
Seattle