If you have a buddy that works in a grocery store, it's a pretty easy fix.
You could use egg cartons, but your chances are probably better to get some of the thick paper-mache type separators that come in large boxes of apples. they are about 2 feet by 1 foot, and theres probably about 5 per box that gets worked, and grocery stores get alot of apples.
If you live somewhere near a trader joe's (where i work) the management and employees would probably be kind enough to set some aside for you if asked. Apples get worked in the morning, so you'd need to let the store know in the morning. Collect them daily for a week and you'll be set, they let me keep all the ones I worked for my room.