If you do not mind having your doors left unlocked just get another ignition cylinder.
Otherwise a locksmith can figure out the key cuts from an intact cylinder
Now for your PATS issue
There ARE locksmiths that do have a device that can connect up to your car's computer so that they can reset the electronic key codes
You are in luck that you are in Chicago so some locksmith should have it
When you do call them up you should initially state that you have the car's title, insurance papers and will show your I.D.
You need the following keys made:
Three smart keys, one of which gets hidden in side the car
One dumb key that gets hidden outside on the car someplace
Lose key, get dumb key to unlock the doors, use hidden smart key to get yourself home
If a crook finds the dumb key, he also has to find the smart key that might be hidden in a thousand and one places