LGV seal sits on a detachable carrier. Fabricated one to take HW seal. Would be easier with a lathe.
LG 55 sits on a washer screw fixed to piston. HW seal sits straight on the washer. Sloppy fit but OK for temporary fix. Still there on ours but only occasional use. Need to make a better fit washer sometime.
May have a spare seal for you. Will look tomorrow.
P.S. internals interchangeable methinks. Again check tomorrow.