no oem boxes? electrical tape the cover plate on..it wont leave much residue. and take the finder off.
buble wrap..at least an 2~3" then a decent tight box .
now find a box about 3" larger then that. pour 3" of peanuts in the bottom , add the box fil around it. repeat again. that gives you triple layers of card board 4~6 inches of peanuts and another 2" of bubble wrap.
you can hit that with a baseball bat probably.
note do not use peanuts on the first layer, the item can wiggle and settle .. bubble wrap keeps it floating. the box is too big to settle. so peanuts ok for that.
appliance stores, sports stores and medical supply shops are great sources for large boxes, or cardboard that can be cutdown to make a box.