It would get expensive but firing more than one missile at your target would defeat a laser that can only target one. The launch sites would have to be located far enough away from each other that the missiles would be out of the blast radius for most of the flight. With civilian GPSs and wireless communication, I'm sure it wouldn't be difficult to synchronize the firing so that the missiles reach the target at the same time. (GPSs not for guidance but for calculating firing delays)

"Give us a product at the lowest possible cost so we can maximize our profit. Damn the consumer." ...They make crap because American corporations ask them to make crap.