Yeah there's a book that tells how they made the prop for TNG, and they say it was used in 2 or 3 episodes, but I only remember it in the one where Geordy become that dark creature, with Blue Glowing vain things, all over him.
As for the flashlight, I would be happy to pick some up for everyone. I mean, it's not like going over to Meijers and picking up as many as I would like. I do have to wait 'till I come across some. Some times I'll see 2 or 3 in a month, and other times it could be a year before I see one. I'll take down the info, and see if I can find some of the model.
They made them for years in that style though, so there my be other models that look the same, just with a different color, or battery type in side.
Jason