A word of advice, get an OEM lock cylinder and key (avoid ones that still turn, but have wear issues). If you get one that came from, oh... RockAuto, Amazon, eBay, Oreilley's, AutoZone. etc etc... they are crap and don't hold their position in the off mode very well after time and it's hard to tell when you turn it off.
The pic shows 3rd party lock cylinder, notice the crappy brass / tin locking pin for when its in the off position? They bend really easy. OEM is actual piece of metal and are designed diff than 3rd party. So, if you see the flat piece of metal, run away! I have been through 3 of these in the last 20 + years and will never get these again if I can help it. Others may have not had much issue with these lock cylinders, but I have been putting up with them since I bought the car. I think the car was a repo cause it never had an OEM lock cylinder.