I'm not sure what morality has to do with applying for every private gift aid available from NPO's and companies. It's either a prime function or a write off for them. One of the weird ones I received was 500 for being a direct descendant of a signer of the Declaration of Independence. Paid for books that semester
Of course that was 20 years ago. There may be even more obscure ones now.
While Fastweb was a good place to start, there are other reference sources that are more robust in terms of displaying current aids.