what I've found very effective is to buy 2 Styrofoam sheets
cut out the indent of the magnet on the bottom and try your best to outline the top
put a couple towels where the magnet will sit on the styrofoam then load the space between the bottom styrofoam and the top with the little shipping peanut things
then put some bubble wrap around the coils
that's what I've found to be effective at least