Anybody signing Sandow would be mad. He hasn't played at a decent level for over a year, with his last televised appearance being a drunken street fight.
WRT Hastings, I honestly wouldn't bust a gut to get him, especially on a long-term deal. Assuming we have quota room, it could be an idea to offer a short-term contract just for this year to him, but there are other options like Kane Elgey of the Titans or Jayden Nikorima. All of them have issues, but for a short contract covering a few games who knows, we look in need of a Segeyaro-style lift at the moment.