Tractor help has a bolt on hook kit that uses 2, 1/4" plates to sandwich the loader. Should be enough to make things stiff enough that you shouldn't bend the bucket if you use it within reason.
They don't have a picture up on it. I'm headed out of town for the next few days so I won't be able to get a picture of mine. Used it this weekend though in putting the "summer" toys away and getting the "winter" ones ready for the tractor. Handy stuff.