Thats the stock size as far as I know, look on Home - Discount Tire Direct
and give them a call, they will usually give you a better price if asked. They are good to work with. You can then price locally (see if locally will include mounting/balancing) and how much that costs separately to see where the best deal is... chances are online will save you cash.
If you have a picture of your stock rims i can confirm the size but I am pretty sure you have the stock ford 15x7 inch rims so those tires are the right size from the factory, discount tire direct has a tire fitment thing so they will show you which fit your car or you can ask them on the phone.