Help fixing Receptacle

Hello, My voltage is 220-240v and I have recently purchased voodoo receptacle but the receptacle is not fitting to my U.K. std wall back box. Any one knows who sell U.S. std this back box? What will be the size for U.S. std? becoz I want replace UK back box to U.S. Box on my wall to fix receptacle. Also guide me How connect the wires to this Receptacles?

Appreciated yours info on above. Thanks.

Rabbani