Does anyone know of any on the market for the gen 3 Prius? I reallymwouldnlove to get small preferably powered sub. I'm not a huge audio knurd but would love to have some extra bottom end. Bad thing I regularly use my cargo space and don't want to lose it. Would love to have some sort of box that would fit on the sides in the back sort of tucked away. I'd prefer to buy something cause I'm really not a "custom job" kinda guy. Just thought I'd throw it out there and see if anyone had any thoughts. Thanks ahead of time.