i have 3 sets of 4 stands made from Ford axle trumpets.One set is full height,next set is about half height,and last set is shorter than that.I got them from an old shop that closed up around 1975.A set of stands came with them made from Corvair axle housings.Those have a cupped bell at the ends that hold things up,and the bottom is just the stripped down backing plate.Those really were not used as vehicle jack stands though.They were used to hold things up while working like axles,springs,mufflers,gas tanks etc.I don't use them myself much,because they're not adjustable.They're just part of my collection of old gas pumps,torches,jacks,lube equipment,air meters,battery chargers,etc.I don't know when the old boy made them,but he was operating his repair shop when the A was new.Never had a lift.