[Oblarg]

We currently use a rather low-quality one made of MDF which holds 4 chargers and batteries stacked vertically. Probably going to remake it out of plywood so it will last more than another year or so.

Unless you're looking for something really fancy, it's not hard to design one that works reasonably well. A bit of advice from my experience: don't make it out of MDF, it's a terrible material that splits when you screw into the edges, pilot holes or not. Plus, it outgasses formaldehyde.