I will hold back on some of my opinions, but will say that @OP, so sorry to hear this. What an absolute JOKE! The fact that you would even sell these without an ample supply of spares, especially when this system is now responsible for so much of the vehicles function, to me should actually almost be illegal. Think about it, what happens if the system dies, in the winter, you can't turn on defrost, you can't see, and you get hurt in an accident. It is now a "Safety" system, not a "Convenience" system.
I think about it like this, in my industry, If Dell for example were to sell servers without replacement parts, and a company loses revenue due to a sever failure and no parts, Dell could be liable, and that's not even a safety issue necessarily.
As others have stated, I would seek council at this point, demand a buy back and go get something else, not that there are many better options out there right now, but this is just a Joke. Ford should be ashamed, but I don't think they care. What I can also say, is that based on my experience recent with the Sync system, there's a good chance even getting your new CPU won't help and it will just be the beginning. In my case, Ford required the dealer to replace the APIM, which didn't solve anything, they then tried the ports, that didn't help, finally it was a bad cable (not sure how a cable goes bad when it's completely concealed behind the dash unless it wasn't done right to begin with and got pinched), but in that time, it was 5 visits to service and roughly 12 weeks. For being "modern" systems and for Ford transitioning to a "software" company, these systems have extremely rudimentary troubleshooting capabilities. The fact that there's no physical bootloader where you can connect diagnostically and "reflash" a system is nuts. I mean you can do that with a $50 RPI.
I hope this situation gets better for you at some point, you deserve better. Just remember, a happy consumer is Job none.