I think you can get a better price on that. I have seen around $1400 or so for that warranty. Someone might be able to chime in with a link to the info. You can buy the warranty from any Ford dealer, btw. Oh, make sure it's the Ford warranty through Ford, all others are worthless.
Have you checked here?
http://www.fordwarrantys.com/index.cfm
I see premium care 100K miles with $100 deductible at $1450 or so.