I make my own sauces too, but I just "wing" it using what ever I have at hand. Comes out different everytime, but definitely works.
Range of ingredients; ketchup, mustard, bbq sauce, steak sauce, buffalo sauce, soy sauce, teriyaki, Thai chili, honey, Sriracha, maple syrup, brown sugar and more but not all at the same time. Like I said, different everytime.