If you do not want to spend money for this vehicle, you can acquire it during a side mission, available for Micheal. In order to start the mission, pull up in-game mobile, type Epsilonprogram.com on internet page, then press the “Evaluate your identity” option and complete it.
Micheal will receive a new contact in Raton Canyon. The mission objective is to steal five cars and drive them to Epsilon garage. Dinka Double-T should be at the side road parking lot, next to the Lifeinvader building, Western Rockford Hills. Since the Lifeinvader building has roads all around it, you can find the vehicle next to the large “Lifeinvader” sign at the eastern part of the building. Just go south from the large nearby golf terrain.
Another location is on the small parking lots in Del Perro, near the beach.