Well, I think I found a site that might be worth looking at insofar as scaffolding and creating a suitable human liver for transplantation....The site is:
www.medpage.com
It appears like they are onto something....The vascular architecture of the liver is very complicated to replicate via biomedical engineering.....The seeding of the scaffold, how many millions of hepatocytes are needed for a successful regeneration, and successful transplantion---simply enormous....