please may I borrow a hole saw?

I only ever seem to post on here when I want to borrow something these days. I must make more of an effort.

in the mean time, since reorganising our kitchen, I need to make a hole in the back of a cupboard to admit an electrical cable. Appliances being manufactured as they are these days with moulded plugs, I need to drill a hole large enough for a three pin plug to go through.

I'd prefer not to hack away at it with a hacksaw as while it would give a satisfactory solution to the problem it would not be very tidy or elegant.

I'd be very grateful if anyone might have a holesaw of maybe 6or 7cm diameter that I could borrow for an evening.

Thanks