Not to long ago i picked up an 'auto body half-football dolly with grip' from a harbor freight parking lot sale ($4.99!)
i bought it with the intent to use it as a bottom fuller/psuedo horn becaues the horn on my little ASO is pretty flat on top, like a round edged triangle. trouble is the blasted grip is far too large to fit the 1" hardie :(
ideally i would like to reforge (handled top fuller over the horn and a striker) the shank to bring it down to about 1" square, or at least close enough to where a massage from the belt grinder will finish it up without wasting too much material