It should be no problem finding an adapter to do 220, kind of suprised that it is not already "Universal".
I spec stuff for worldwide use and most stuff we find is 100VAC-240VAC 50/60Hz. Very few thing anymore are just 120Vac...... Maybe a cheap alarm clock!

You just may need an adapter from US to Europlug. Sometimes the 50Hz can be a problem, but with a good switcher supply, 12VDC at 2AMPS(24 watt) is what is needed, quite common actually.