[Ichima]

So a couple weeks back i got rear ended. The body work of my car came out great but my main concern is the body shop arguing that my exhaust was not impacted during the accident. Clearly my exhaust had been pushed in and it now rubbing against the rear bumper and also the left side is pushed inwards and positioned left firmly touching the bumper. Body shop says they don't specialize in aftermarket exhaust and can't repair it. Accident was not my fault and I'm not sure of my options now. I have a SRT Headback exhaust and it's obvious they are no longer around. Is there anyway I can argue to purchase a newer exhaust and have it installed?