Really all you need is the proper modular "duckhead" attachment that Apple has used since the original iPod and white iBook power adapters. I'm not sure where you can buy one or maybe even get one swapped for free, but it wouldn't hurt to ask. I can't seem to find any place that sells them - even aftermarket replacements, but they look like this:
I'm pretty sure you could buy the World Travel adapter kit anywhere that Apples sells products, but that would have pretty much everything including a lot you probably don't need.
The power adapter itself is universal and can operate on electricity between 100-240V AC at 50-60 Hz. You could also use a passive adapter just to make a wired connection of the pins/blades to the outlet.