I think you might avoid cracking it if you heat it up with a torch before bending it.......
How much and how long to heat it I don't know, plus there will be no guarantee if the RD mounting hole will be salvageable as it will most like be ovalized and the threads deformed, but that I'll not keep you from trying to use an RD with a threadless mounting bolt like many Simplex RD models....
Hmmmm.... I'm wondering If that wrong sized skewer (way too long) had something to do with that RD hanger's demise........