I want to keep this door please!

My kids figured out how to break the door off of our minivan. We have to park on a hill and a couple of years of opening the side door and just letting it go "kawap" all of the time took its toll and killed the roller. I took it into the dealership to see how much it was going to be to fix it. The first thing out of the service guy's mouth was "I haven't ever seen this before! I have no idea how to fix this, but I am sure I will figure it out." That instilled so much confidence in me. I decided to get a second opinion at a body shop. Hopefully they have done this sort of thing before and I will be able to drive down the highway without fearing that the side of my mom-mobile won't fly off.