Im sure a new front could be put back on the thing... Ive seen it done too. I just think that with the amount of damage and the fact that all this effort will cost out of pocket because theres a chance that insurance wont pay up, that IMHO it would be smarter to just part this car and make some cash back, then buy a decent 510 in the area and start again. That will save you from all the headache that is grafting on a new front as well as take car of any of the issues that this car had. You can start fresh.
If youre going to spend the time and money out of pocket, Id rather spend it on a non-wrecked 510 than one that is. With the amount of damage, even if insurance pays you, its still going to be a savaged title. Theres way too much damage not to be.