First…you can’t attach anything to the CSS Profile or any other financial aid application form. You fill in the data and submit the financial application form.
If your college requires the non-custodial parent Profile, your dad would need to complete that. Not you. Not your mother’s lawyer.
If you want to ask for a non-custodial parent waiver, then do so. Ask each college to which you are applying. All will have a process for making this request, as well as the documentation you need.
Some schools might grant the waiver while others might not.