[Elecraft] Power supply for 220 VAC

[Ken Alexander]

I'm planning a short DXpedition to a 220V country. 
Does anyone know of a quiet switching power supply
that would run on 120V 60Hz and on 220V 50Hz?

I'm leaning towards a QRP operation, requiring a
smaller supply, approx 5A at 12V output.  However,
since this is likely to be a once in a lifetime deal I
might take a 100W transceiver and would then need a
larger supply, say 40A at 12V.

Any guidance would be appreciated.  Thanks in advance.

Ken Alexander
VE3HLS