I want to avoid using additional cloud objects but yes, that is a plan B.
Can it be done this way? I do not know but I don't see why not, yet. Delayed FormFunction can capture parent HTTPRequestData so that is ok. The problem is, what happens on submit? I need to 'invoke' the same form using customized HTTPRequest but I am not sure what is the way it should be done.
I even tried `FormFunction[..., URLRead[(*spec to give me html of the parent form for the new request*)]]&` but that never finishes.