I don't have great hopes for coverage, but it's worth asking about. Try one of the online places like floodfordesp, lombard's, etc. I don't know if you can afford to wait to repair the SHO, there might be a "probationary" period before the warranty applies. Like home warranty contracts, 30-45 days, for example.
If that route doesn't work, you could always call up Ford National Customer Service (number in back of owner's manual) and see if you can work something out with them, as you are not far out of warranty by miles, and really barely out of the B2B warranty by years. They have reps on the Edge and Flex forums, that I know for sure, and they tend to be very helpful.