It depends on the seat type of the wheel. Most likely it will be either conical or flat:
If conical then any 12mmX1.5 lug nut should do - even the original lugs. Make sure it is a 21mm hex (means a 21mm wrench fits it which is very close but not the same as 13/16"). You can use an open lug such as the following Dorman lugs:
You can also use chrome capped lugs such as 611-133
If the wheel uses flat type lugs then you need washer type lugs like these:
or 611-117 (Chrome)
I've used Dorman lug nuts for years with no ill effects. They are good quality and last a long time.