Hitachi EX120 "Grey Market Machine" Parts Help

I am looking at a Hitachi EX120 grey market machine and was trying to figure out the parts access for these machines. I'm talking about the 120s, 120-2, and maybe the 120-3 machines. The one I'm looking at is a "Legacy" machine which I understand is a true grey market. First, are the 12Nxxx S/N machines all grey market? Are the parts numbers all different? Were they built with different parts throughout? If not, can't we just refer to a US marketed machine parts book to find an interchanging...

Hitachi EX120 "Grey Market Machine" Parts Help

Hitachi EX120 "Grey Market Machine" Parts Help