We bought a third-party "Digipower Solutions" adapter from one of the online camera shops. Here's the details from the label on the adapter (I didn't keep the box):
ITEM: ACD-RC
AUA-05-1600
INPUT: 100V-240V-50~60HZ/0.3A
OUTPUT: 5V==1600MA
UL LISTED
E153138
Hope this helps.