To tell you the truth, I have no idea what the Orthodox Jewish rule is for lifetime amputations and later burial. My guess....the issue involving non-mutilation of bodies seems to me to go back to the idea that someday the Messiah will come, and all will be raised up to dwell in a world of peace and justice. This is a tougher job if those bodies are scattered, or cremated ( a practice also against Jewish tradition.)( And I suppose even more complicated if two people used the same organ!) But if you managed to get by after the war, or other "honorable" loss of limb, hopefully you would be able to get by in the next age. Or maybe the Lord takes care of this; I don't know, but I would love to have a rabbinical comment on the subject.
Jews in my experience do not spend too much time on afterlife issues; getting through this life is enough of a challenge!