Does it have a plug in on the base somewhere for an adapter? if yes, then you should be able to find an AC/DC adapter, but make sure it's rated for correct voltage/amps. You plug the wrong adapter in, rated at higher amps, and you'll fry all the LEDs.
I have no idea what these require. If i had to guess, 5V (maybe 12V), and only a small amount of current, maybe 200 mA at most.