I don't think they're big sellers, got mine off LApolicegear for a good price on closeout.
It's not a flashlight, but a marker beacon, so I don't think you'd want to use it like a normal light.
Got a green one for my motorcycle bag in case I break down. While not bright like our torches this thing can be seen from far away and the green really stands out.
Hope I never need it, glad it's there.
It seems like a disco-mode enabled DX light and a couple of tubes of clear epoxy might get you a cheap clone. Just thinkin out loud...