How to replicate Mr&Mrs T’s margarita mix?

I’m a huge margarita drinker, and despite doing every proportion of lime (sweet/concentrate/fresh), triple sec, tequila, and agave under the sun, nothing beats the fake stuff of: tequila with the Mr&Mrs T’s margarita mix, and I hate to say that. It feels like I am cheating myself. I have no idea what they put in there, but I want to figure out a way to make a margarita that tastes identical to theirs, but without using their mix. Any suggestions?