A 100volt 2ma zapper should be easy to make and cost a little more than building a regular zapper. The people who I have read about curing themselves with fence therapy were using 10,000-15,0000 volt units. It should be human and small animal safe so check that first. I am not telling you to go kill yourself now in the name of Science because if you go who is gonna report back and let us know not to try it.
Analogkid I hope to hear your views as lunatics like ourselves need somone sane to guide us.