If you actually have it, post a picture. I can usually tell Bagley from a photo, although I'm not infallible, despite what Anne says :24:
UV lights can also be found ebay, but a Maplins one is likely to have a better quality LED. A key ring light is adequate for "shopping" purposes. Remember you must get a bright green reaction and be able to see it in daylight (but not necessarily bright sunlight). A keyring light held close to the glass will give a bright green beam in the glass. Further away it's more likely just to give a "brightening" effect.