When you buy a new vehicle nowadays, there are so many bells and whistles that are just amazing - but also VERY expensive to fix. With our new car purchases, we usually get an extended warranty beyond the standard 3-yrs/36k miles - why? Because we usually own our vehicles beyond those time-frames and/or miles...
Sure you can use your dealer that you purchase from, or shop around - I found this site is a full coverage Ford/Mercury/Lincoln dealer that offers excellent pricing!
Just put in your Make, Model, Year and the numbers are updated for you. They offer $0, $50, $100 and $200 deductible plans up to 8 years and 150k miles!!
Trust me, the prices are fantastic!