The pieces from Dino Island might be able to answer the consciousness transferring question, provided the actual creating a backup body is practical. I'm a hedgewitch, not a mad scientist, so...
Assume the participants are those who have consented and are willing to give samples. Jesus. How hard would it be to construct the growing tubes, account for growth rates, not even necessarily within the reset cycle-- anything we bring in outside of Derleth doesn't reset so... If we were using magic, in theory the body would go dormant on reset and be available for reuse the next time things go to hell. How would you essentially make a golem using science?