Wanted: Tsunami / Sceptre foldable ladder

[abl1111]

The d*mn SC ladder ! I need one of these if someone has one.

Or, I would like input on how to make one that is similar; light and strong - made of wood, plastic, anodized aluminum ? I have posted for this before but it ended with no real solution. Although there were a lot of people who tried !

The hard part is - ' what can be used as hinges / pivots to allow for the fold-ability factor ?' Awhile ago, someone mentioned something like a mini ball-joint type thing. Any ideas ?