I know this is a long shot, but can someone please share the recipe for Papasito’s zombie margarita?

I'm from south east Texas and just moved to Washington state. I am missing Papasito's mixed grill and zombie margaritas bad. While I love it here, the Mexican food and margaritas out here are ass, so I'm determined to make it myself.. anyways if anyone sees this and knows, please help me. I've seen the ingredients for it on the menu, but I'm not sure of the proportions, or how they make their fassionola syrup. Thank you!