I am sorry, but no rescue will work with such a dog. And no shelter will do anything with him but euthanize him.
I agree with one important caveat: no responsible
rescue or shelter will take this dog. Not with that bite history.
You may, if you look long enough and are willing to pay generously enough, find a less responsible rescue and/or "no-kill sanctuary" that is willing to take the dog.
I would be very, very careful about entrusting any dog to such an organization. While it's tempting to imagine that they offer a happy solution to your dilemma, the great majority of groups willing to take dogs with this type of bite history are clueless, delusional, and/or exploitative, and the fate that ultimately awaits animals in their care is far worse than the merciful end of a needle.
ARCHMX TDCH Pongu the Insane, CD-C, RE, RL1X6, RL2X5, RL3X2 (GSD mix, b. Apr 2010)
Crookytail the Tigerwuff, RL1, ITD (Akita mix, b. Jan 2011)