can you leave the shock alone, and use coil spring compressors to crush the coil and get it out? Even trap the coil in the compressors by jacking up the axle and using it to squash the coil?
NOTE: in saying this I have not done it, I do not know if it is safe, and I don't know what it would be like releasing the tension from the spring compressors. Nervous, I suppose, there would be a bit of energy stored up in the system :-)