ACER 220V to 110V Power Supply Replacement?

Hoping I came to the right place - I'm relocating to the US from Europe soon, and I am bringing along my two Acer desktops, one being my Acer X1700 and the other the one I am currently using, the Acer AX3950. Now since I bought both of them here I am assuming that their power supplies will not be compatible with the US (unless they are dual-voltage which I haven't been able to figure out - and there is no switch to change the voltage either) - is it possible to just have the power supply replaced? If so, how or where would be the best place to get something like that done? Would appreciate any advice anyone could give me...