you can get them at a ford dealer as long as you have the vin number and they are stock lugs and key...otherwise, if they are aftermarket lugs ull needa go to a shop and see if they can take them off with their lock removing tools...
I found a method that worked well for me. I found a socket that barely fit over the lock, then made a shim out of a piece of steel trapping I had, maybe ~.050 thick, 1" long and 3/8" wide, I hammered on the socket with the strapping between the lugnut and the socket... then took them right off.
I did this on the 2 lugnuts that I could not get off after trying vise grips, hammering on a tight socket, etc. this was very easy and fast.
I tried buying the DIY locking lug remover, but it didn't work too well. I ended up having a guy from Tires Plus come across the street to my friends shop where the car was and he got all four off in about 10 minutes. Didn't ask for any money either. I'm sure if you're going to have the place put new tires on for you, then they'll probably get the lugs off for free.