How would you morph objects to fit inside offset box of a mesh?

Question

I am trying to distort each mesh geometry to fit within the box made by offsetting the mesh surface.

So far I have successfully been able to modify each object individually by manipulating vertex groups from the original object after the Realize Instance node.

where I am stuck is:

1. Selecting each box and its corners
2. using that data to distort the related geometry
3. the best way to distort

Keen to hear if there is a simpler way to achieve this, that still enables me to modify each object after.

Thanks!