Seems to me that Jay (possibly) isn't aware that Jap stuff meant for the Jap market is only 100/110 Volt.
Likewise, the Yanks are so insular and "stay at home" that they can be foisted with 110 Volt equipment with no "220 Volt" switch provided. I bet that they had catastophic failures when they plugged their military stuff into the Iraqi mains supplies!
<Tongue in Cheek Mode OFF>
However - I *do* agree with Jay that some computer component shops will sell you a replacement Desktop power supply that **WILL** work anywhere in the world that has mains.
They will probably make a small charge for doing the fitting - that's reasonable enough.
Personally I can never understand this "Coals to Newcastle" attitude of people shipping electronics stuff here when there's a much better supply here at cheaper prices - much better to liquidate the items "back home" where one has half a chance to recover at least part of the various taxes imposed when bought.