+1. Before you buy anything bend it the best you can and see if you're satisfied. If the frame doesn't have a replaceable hanger, you can try to bend it yourself with a large adjustable wrench. Or take it to a shop, which will have a special tool that screws into the hanger and is very long. It can be rotated around the rear wheel and will get it just the way it should be.
There's not too much you can do about the derailer. Bend it if you can, replace it if you can't. Good luck, and heal fast.