Truck Topper - 100x69

I have a Range Rider truck topper that measures 100" x 69". It is white. No cracks. The ceiling rises toward the back. Windows all work. One has a screen on it. Has a brake light. Problem: - one of the liftgate supports has fallen off. It needs to be re-attached at the frame. I think a rivet gun would do the trick but I don't want to spend $30 to find out. - the keys work, but the little metal guards to the keyhole don't flip up when I insert the key. I have to manually open them with my knife edge. Annoying, but it works - some of the rubber gasket material is coming apart Asking $350. I think that's fair, but there's a catch: you have to help me move an axle out of the bed and into the garage (15 feet or so). I don't know what this will fit. Maybe a Ford after 97 or a nineties Chevy? Really not sure. It is 100" x 69".