Need help with 400w ballast

[cl2ysta1]

We bought this ballst new never used from a fellow member. I'm guessing it was fine it wasnt rattling my bf said when he shipped it out. I got it today, and hooked it up. it fired up the bulb. i left came back and the bulb was off. I picked it up and was looking it over and it rattled. I than opened it b/c we dont have an origional reciept and i wasnt worried about voiding the warranty and tihs is what i found. I have a few questions.

Is this repairable?
How do you do it if it is?
and how do i get rid of this burnt rubber in here?

I emailed coralvue to see if they did repairs and if this was even fixable. here are some pictures. we'll see what they say

here is the donut piece that was broke off



here is where it came out of. notice the burnt melted plastic on the other donut



full ballast shot