If the pulleys line up and are on the same plane, does not matter how bent the bracket is. The whine is either normal....or bad bearing, bent pulley on alternator or other rotating component. A squeal is the belt.
There are two dozen ways to make an alternator bracket out of another bracket or some metal.
This is your guy. All kinds of brackets for every year. May be a member. At least you can see how it's done.
Donor parts from 230/250 may work.