The websites you have mentioned are "feel good" services targeted at grieving consumers, but are unlikely to produce viable samples down the road. Regardless o

The websites you have mentioned are "feel good" services targeted at grieving consumers, but are unlikely to produce viable samples down the road. Regardless of the advancements in science down the road, a biopsy is required now to produce a sample that can be cryogenically preserved given current technology. Cryogenics is not something you can do at home, at comes with quite the price tag. Three things to look for to help find a legitimate vendor: 1. Should not offer human/primate sampling, banking, or storage. 2. Should not accept deceased samples except by special case. 3. Should require a veterinary specialist, no do it yourself kits.