John, I think someone sells under the floor boxes, for some body styles.The early phaetons placed the side curtains in a pan under the rear floorboard. When I first got my phaeton I didn't have the pan and made one that was deep enough to place tools and a jack etc. The luggage had to go on the rack on the back and you are running the risk of someone taking stuff off the rack. On one of our long tours, one of the folks lost a camera out of their phaeton at a lunch stop. So you need to be aware of leaving stuff in the car when you can't see it.