Maybe like this ;)

But you must select (or extract) the 2 Lateral Sides edges for input them inside the Selected Nodes!
So 4 Clicks ( 2 for selection, 2 for input nodes) and read some little things about the Elephant nodes System by Max Smirnov... :)
https://moiscript.weebly.com/biblio-elephant.html
that can't maybe not a pleasure party! :)
https://moiscript.weebly.com/uploads/3/9/3/8/3938813/offset_lofts.nod