Or, maybe get a sheet of cheap corrugated plastic at Home Depot. Probably cuts with scissors, and you could attached it with double faced tape.I don't think they will move that much. I have thought of a peel and stick mat to add some sound insulation that would help.
Since we haven't heard from them on this thread since 2015, they probably already died.No partition? You’ll die in an accident. Especially with those L brackets, it’s not going to take much.
Trust me, I was in a medium accident with pro installed shelves that used plus nuts etc. They collapsed and tore out from the walls. It was a disaster.