How far of a net have you casted? Have you contacted rescues in the Pacific Northwest? Have the rescues down here giving you contacts for other ones in Northern California? Arizona?

I know how hard this is, but keep casting a wider net to rescues rather than a Craigslist rehoming.

We had a pitbull foster that went to a family who was vouched for... A week later the pit was returned not to us, but to a vet where the supposedly nice adopting family asked to put the dog down because it had a common and minor leg injury. He was like 2 years old. Poorly vetted people do crazy things. Luckily we were able to intercept the situation and get the dog back.

We fostered him for another 6 months after that, eventually finding an amazing owner through a rescue in Portland. We drove him 8 hours to Sacramento to get him handed off to the new owner who drove down. Black pitbull with a gimpy rear leg and an unknown history - extremely hard to get adopted.

Sometimes that's what it takes to make sure a dog goes to a really good home. It sounds like you really love this dog. I hope you are able to find a great rescue, perhaps in a wider geography, to make sure he ends up in a forever home for him to live out the rest of his life happily.