Just a follow up, the new superseded parts are in. The new set up works much better than the mangled fingered former design. I would have not known to get the metal 'ribs' or even try this part number if it werent for this thread. Once the ribs are bolted into the plastic cage, and the mesh installed, the piece becomes very ridged, the bottom locks in and the top also fits tight.
This is the new frame design K2581-57136
then you add:
K2651-57930 metal support 1
K2651-57920 metal support 2
02751-50060 x7 Nut
01754-50614 x7 Bolt
This is the new frame design K2581-57136
then you add:
K2651-57930 metal support 1
K2651-57920 metal support 2
02751-50060 x7 Nut
01754-50614 x7 Bolt