i made mine, two pieces of 1/4" steel plate and two threaded rods.
took about fifteen minutes to make but i do have a plasma cutter!
cut a rectangle hole in one piece and a slot in the other, put the bottom of the shock in the bottom(rectangle end) and the top in the slotted end, then tighten the nuts on the treaded rod, do use caution as you don't want the spring to fly out at you.