Or even straight on top of IPFS since there are existing HTTP gateways for IPFS to access the content and most of the archive is static in nature. Provide a client which can be used to coordinate between the numerous volunteers to ensure a wide (ideally full) backup of IA distributed over IPFS, paired with volunteer pinning of specific portions by interest groups and individuals. Their self-hosted IPFS node(s) would become the permanent seeds for this system and broader use of IPFS would ensure wider (though not guaranteed sans pinning) availability.