You are light years in the past! There is hardly anything Union made in the USA anymore!
Does anyone know of a source for union-made keychain lights?
What was that song in the old underwear ads? "Look for the Union Label". Sorry, once again I couldn't resist the opportunity for a lame joke. As far as your question, I can't help you.
Geoff
As Carrot said, LRI makes the Photon coin-cell lights. They are made in the USA.
Princeton Tec Pulsar coin-cell is also made in the USA.
I don't know if either company's workforce is unionized (I'm sure a few emails or phone calls could inform you of that), but at least the product is assembled in the US. Most likely the 5mm LEDs came from Asia.
May I point out the elephant in the room?
Maglites are manufactured in Ontario, California. Now, does anybody know if they are a union shop?
Maybe not all "union made", but here is good search engine for Made in the USA products........
http://www.madeinusa.org/nav.cgi