I'm guessing they will turn up. If not, I doubt you would need to drop off your car to get replacements, unless they can't cut keys there. I suppose there is always an if. If there has to be more than one key to be able to program additional keys. Gladly, that would their problem, not yours. Chances are, they would give you a loner if they need the car for any appreciable amount of time.
Dumb question, have you looked in all the storage bins just in case someone put them in the car at some point? Down along the console between the seats?