Maybe use the Euro-plug one if cheap travel adapter is available?
DX.com for example has cheap travel adapters. I ordered one from there as I needed a US->Euro adapter for RaspPi's psu.
Europe electricity is at 50Hz, USA is at 60Hz, so I don't believe the meter wouldn't read correctly anyways.
Actually some meters have a feature which measures the network frequency and takes it into account.
There is though a lot of different kind of meters available like for example this comparison of the products available in Finland shows.
http://www.hiit.fi/files/admin/publications/Technical_Reports/hiit-tr-2009-1.pdfOf course taking notice if the device is approved to be used both in 50 and 60Hz is reasonable.
For example
Velleman NETBSE M2Velleman includes the best package of functions. It
can display all typical figures, but also power factor,
network frequency, and the maximum load. The
device was very accurate on all regular loads. The
errors for reactive loads and consumption were
excellent .....