Lost Lock Nut for rims! Where find replacement???

Hey guys.. so stupid as I am, i have mis-placed my Lock nut for my Rims. I need new tires and I can't seem to find them. Can anyone tell me ASAP what store I can go to to help me out with this problem?? I have konig rims but I'm hearing it could be any lock nuts that could have been used. Please help me out!!!

A few options:

1. Post up a pic of the locking nut, maybe someone has a spare.

2. Vicegrips, pull that fucker off.

3. Take it to a shop, Mac tools makes a kit that can remove any nut.