Anyone know if dump trailers are available with manual hydraulics instead of electric? I am looking for a 5x8 dump trailer that offers the ultimate in flexibility. Behind the tractor, behind the car, behind the truck, behind the pick-up, etc. I know this will end up being behind other peoples vehicles as well, so I don't want to worry about the battery. If I can't find one, I might need to have one made as my fabricating skills are not so good.