wheel lock missing. Need help asap

[280z/300zx]

So went on a Z cruise today with a bunch of local members and manged to get a flat in the parking lot of where we were all parked. Changed the tire no problem but some how miss placed the wheel lock. I'm racking my brain trying to remember what I did with it but I draw a blank after torquing everything down. I remember putting the tools away buy not the lock. Long story short, had the tire fixed but I'm stuck with the spare on the car. Anyone know of a way to get it off? Big-O tires suggest going to Nissan to get a spare key but I doubt that is possible. If someone knows of a way to get it off, even if I have to go buy a tool tonight, please let me know. I need my car for work tomorrow and with the amount of driving I do every day the spare won't be safe. Thanks