It is sad for me to see too....As you say, my biggest worry is the
housing being damaged, although I am hopeful it is ok, as the damage happened quickly..
I think it is possible (according to the manual) to remove the
brake pulley by screwing two 1/2" UNF threaded bolts into the pulley acting like a
hub puller.
There is a breakers yard about 8km from me and he has at least a couple of 580c's and there are online guys, so sourcing parts isn't too difficult..
I'm sure It will be a job that gets gradually done, although my holiday will be spoiled as I will be thinking of solutions all the time, and not paying attention to my girlfriend...lol
I will update you guys as I proceed and will probably need more advice.
Thanks so far...