I have a drive on 'hoist' that I got given a few years ago. It's basically a couple of ramps that have a pivot on one end. You drive on to it, lift the back end up with a floorjack and block it up. The car ends up about 18" off the ground. Problem is that it's in pieces and I've lost the instructions. Anyone any idea what brand it might be and where I could find assembly instructions? Haven't managed to turn anything up with Google.