You may have a chance to save your baby :)
I had a similar incident - car had a prang and dented a few panels. Cost to repair was greater than the value of the car, so the insurance company offered to pay me out for my car.
The thing is, when they work out the cost of repairing the car, they use original parts that cost an arm and a leg. Luckily I have a friend who's a mechanic and he worked out the cost to repair my car, would be a lot less than the insurance company quoted. I asked and I was given the option of buying the car back for £200 - so basically I got my car back plus the cash value of the car, minus £200. My friend repaired it and it had to be inspected and I'm not too sure if I needed to re-MOT it .... it was a while ago.
In the end, I was £50 in pocket and I got my trusty car back repaired at a fraction of the price that the insurance company quoted :)