You know what?
Go download Maya and Photoshop.
Make a Mercedes SLS or CLS or something.
Then fly yourself to Germany and tell Mercedes you want to mod their precious new car into this:
http://www.youtube.com/watch?v=j6LPxAj7D1w
I guarantee, they won't give a toss if you think the damage is good (though it is really good), because they'll be too busy requisitioning the forms required to boot your sorry behind out of their building and back onto the curb, while laughing in regulation Mercedes fashion.
There is NO WAY ON EARTH a car manufacturer will agree to that kind of damage. Apart from Volvo, but then you wouldn't be able to tell THAT apart from existing GT5 damage.
No racing sim is going to match Burnout of GTA for damage. It's just a fact of life, everyone needs to shut their traps and deal with it.