Yes, Ford can cut you a new key if you have VIN and proof of ownership, but...... Key needs to be added to PATS anti-thief system, before key will start truck, Ford has to have the truck there to do that.
Ford dealers don't have mobile service so you would need to have the truck towed into them.
Many locksmiths can now add keys to PATS and they offer mobile service, call around and get prices, and they of course can make you a new key.
I would get 3 keys, if you lose one you can get a 3rd and add it to PATS yourself, but you need two working keys to do that.
If you have one key and lose it......well you are where you are now
If you have two keys and lose one......you will need to get another key for back up and pay someone to add it to PATS
If you have 3 keys and lose one.....you can get a 3rd and add it yourself.
No one plans on losing keys, lol, but it does happen.