Adding extra disc holders/spacers inside a Steelbook

[GreatGreg]

There are plastic hubs you can buy that stick on to plastic surfaces to create a single extra disc holder.

What you are showing though compares apples to oranges. The SLEEPING BEAUTY uses custom plastics that the 2012 does not. And the last picture of BEAUTY AND THE BEAST is an IronPack, not a SteelBook.

You can exchange SteelBook plastics and metal covers, but you can't swap amongst SteelBooks and IronPacks.

Many people will use dented SteelBooks as parts and create hybrid SteelBooks with more or less disc holders.