Lug nut wheel key stripped out.
 

What is my best option for getting a replacement lug nut key? Autozone doesn't have them and I have had trouble finding one online that matches my stock key.

go buy a new set from local auto parts store, and then take it over to the local tire shop and have them break off the other locks, then install new ones

To remove existing lug without key get the closest size impact and with a hammer pound it on lug and you should be able to remove locking lug. Then replace with whatever you decide on.