I had an old suitcase that was more or less the same size as a Safe Box 8. So I thought, I could use it to make my own studio case / gig bag.
Not a huge risk as the foam inlay is not very expensive and I had put in a large order for equipment so the shipping was free.
End result? Success, foam inlay for Safe Box 8570 x 350 x 55 mm fitted my suitcase perfectly.
Now all I have to do is paint the outside of my bag black so it looks cool.