If you decide to smoke the sauce, don't over do it or you're gonna end up with nothing but smoke flavor.
Do a google search for rub recipes, you'll find more than you need. Three things you must have in my opinion in a BBQ
rub is salt, sugar and pepper. Use those ingredients as a base and add whatever other spices or herbs you like to customize it to suit your taste. The salt and sugar will also aid in the bark formation during the BBQ process.
Or you could just buy more Wolfe Rub!