No, there aren't bulletproof windows that roll down for cars in the way that standard power windows do. The mechanisms required for rolling up and down are incompatible with the thickness and weight necessary for bullet resistance. Bullet-resistant glass is significantly thicker and heavier than standard automotive glass. The added weight and the stress of moving such heavy glass would be problematic for the window mechanism and potentially dangerous.
While some vehicles might have *upgraded* glass with some level of enhanced security (often called "security glass" rather than bulletproof), this isn't true bulletproof capability, and it would likely not be a roll-down window. True bulletproof windows are typically fixed in place.
