I usually make my own, and most of the time I never make them the same. However I try to write down what goes into them in case I really hit on something.
If I don't feel like making my own, I usually just hit it with some Tony Chachere's. But I cannot stress this enough. TONY CHACHERE'S IS NOT A RUB!!!!! It is a SEASONED SALT!!! Sprinkle it on as if it were straight up salt!