Sad to see the damage to your car 😔, main thing is that nobody was hurt! Cars can be replaced. There is a lot of body damage let alone unknown damage in the suspension areas and elsewhere. Insurers usually write off a car when the repair is over 50% of the cars value. As previously said, in my opinion, you're best to negotiate a good pay out for the car and source another. There's a white 2008 ISF for sale with 89,000 miles currently on AT for £16,995, for example. Demand for ISF parts is generally very low, due to their rarity, so selling off the parts could be extremely slow and fruitless. Good luck with whatever you decide to do.