I bought one at one of those import gift shops. I haven't seen them anywhere else. You're right. It is heavy. It also requires a special lamp bulb. It's the size of a night light bulb, but has to burn hotter and more wattage. The bulb doesn't seem to last very long. It has to be hot for the lamp to do its thing - ionization. If you just want the lovely orange ambiance, you can use one of those 7 watt night light bulbs.
"I am not young enough to know everything." - Oscar Wilde