I don't know if any of you have pallet storage issues of not, but this is what I finally came up with. It's a lid holder from IKEA. On Amazon for $12. Oh, and not to worry, that lost slot will be filled soon.
Thank you for this. I just made my first ever Sephora trip, and now have two clunky things. One of my drawers in my bathroom is really deep, so I think I can stick it in there and keep them from banging around with all my other crap.