I recently shipped a AMD cpu and all I did was take some cardboard, fold it in 3, trace out the CPU on the center, cut it out with an x-acto knife, fold one end under, tape or glue in place, drop in the cpu close up and call it a day. Alternatively you can add some hard plastic to the cut out to ensure pins don't get bent but for storage as long as you aren't moving it around a bunch you shouldn't need to.