I must be sleeping.... To the OP, how did you get involved in this in the first place? As soon as another party tore out your wiring, it becomes their responsibility. If your customer wanted you to fix it, then you should have negotiated rates.
Flash cut comes to mind. The other vendor took ownership the minute he pulled the blocks off the brackets.
Your $10K figure is grand. (10 of them, pun intended) but in a lawsuit, you'll not be fully compensated for labor and they aren't going to be your customer when the dust settles. Get what you can and remember the lesson you learned. GET IT IN WRITING!!!
Carl
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