Holy smokes - good thing you had it checked out.
I believe parts are so expensive because Mitsubishi has only sold so many of these little guys here. Hopefully your body shop will get the parts you need.
I also find it interesting that you were able to drive it in this condition. I mean, too bad that this caused so much damage; not too shabby that it kept on ticking.
Glad you're safe. :)
Pictures!