It's not anything special or AMAZING but I designed and 3D printed a deck box for commander decks that showcases your commander. It uses magnets to stay shut and holds a fully
Step Two: Put Your Commander in That Box | Article by Robby Rothe
Deck Box Reviews (Extra Large Boxes)
The Best Deck Boxes for EDH - Draftsim
Best MTG Deck Boxes: Which Deck Box Should You Get For Playing Magic: The Gathering?