Get a box that lets you fit PET 1,5l water bottles between its walls and the monitor box.
Then drink a lot of Buxton mineral water, cram the empty bottles around the monitor packaging and nothing will happen.
I use the same trick if my suitcase isn't full. Either that or I use corrugated cardboard fruit trays (which are also ideal for transporting wine or beer - well-wrapped in newspaper and firmly packed in the tray - in checked luggage.)
24 bottles of various microbrewery beers and ciders from the UK a couple of weeks ago......