Naim 282+Naim 250 DR 230V to 120V

Hello everyone! I’m thinking to buy a used 282+ 250DR to pair with my focal sopra N3, it’s currently running with a SN3. My question is the 282 and 250DR both 230V so I need them to convert to 120V, anyone have any idea how much the conversion will cost?
I cannot just have an electrician to wire a 240v from the electrical penal for them right? As UK 230v@50 hz vs US @60 hz. Anyone out there experience the same situation? Any suggest solutions?