Li-Ion Cooling System For A2B

I work at a place in Austin Texas called Alien Scooters. We sell every I-zip/E-zip, EVT's, Zapinos, A2Bs, and Vectri. what brings me here is a customer, she bought an A2B from us and with the texas heat I'm thinking the battery is overheating. She gets to work at 10:00AM (So it's still cool-ish) and leaves around 7:00PM (sun's on it's way down). But on her days off she'll ride through out the day, and within 5 miles she gets a "yellow light" and the motor won't power up: overheated. I've been looking online for a Cooling System but I was hoping someone here could point me in the right direction to help her out. Thanks guys and keep up the good work with the EV's.