2 or 3 c clamps might work, never done it though. for 12 buck i jus built one. 5/8 or 3/4 threaded bar bout 14 inches long 2 nuts 3 washers and a 2x4, oh and 3/8 2.5x2.5 square tubing with one side cut off about 2.5 inches long, something like that anyway
