On a recent trip to England a friend forgot his adapter to plug his USA Mac Book power supply into an outlet in the U.K. The solution? He removed the sliding unit with the USA prongs on it and then inserted a standard two hole power connector into the space on the Apple charger. Like the two hole units on many TVs and other electronic units in the USA the U.K. [and many European] power supplies use the same hole configuration, connected at the other end to their particular power plug ins. I can't say for sure but I think this same idea will work with most camera chargers as well.
THE BENEFIT: The cords are cheap and you get a firm connection into local power, something not always possible with adapters plugged into wall outlets. They can fall out or hang loosely and stop charging.