I get it at Sams or Costco in big Gallon containers, and it is the Classic.
I would like to eventually develop my own, but it is hard to argue with the number one BBQ sauce used in Restaurants, there is a reason.
Further it makes a fantastic starting point, I doctor it several ways depending on what I'm trying to achieve, the easiest is either 3 to 1 or 4 to 1 Cattlemens to Honey. Also I use Cattlemans to kick up hearty sauces for non bbq meats. Plus it doesn't hurt to have a big container of Franks Hot Wing sauce around (all it is is Cayanne Pepper, butter, water), since I started keeping a bottle in the fridge usually a gallon, it last me about a year, and it has found its way into many dishes, (I have at least 5 or 6 different hot sauces). What I like about Franks it can deliver the heat, without a lot of after taste like Tabasco Sauce.