Just swap it for a #1 lever would be the easiest and least expensive if you can find one. Since it is a casting I would be a little suspect if it were bent radically but it is done successfully.
Not so easy. The No.3 locks up via a ball detente into bottom of the action. The No.1 via a latch locking to the trigger guard.
Best a nice reshape of the No.3 lever.
