Don't know what the Tequilla version is called but Vodka and Grapefruit is a Greyhound. Anything Grapefruit combo with Vodka is a DOG. Salty Dog, Greyhound, etc.
I am a licensed Bartender but I only work partys or special occasions. I would'nt survive if I did it full time. I'll check some of my recipe books I might have an answer for your TeKillya drink.
BRB
Steve