Access to education and information should be free - or at the very least a lot less broken than it is today. https://annas-archive.org/torrents
I really would love to help out, but I don't have 650TB of storage laying around :( The logistics of this archive are quite crazy; most 2-4U JBODs I worked with hold like 24 or 45 SFF SAS disks. Standard size (unless things have changed) for 10k sff sas disks seems to be about 1.2TB, so you'd need 544 of these to build a raidz big enough. So we're talking 12 4U jbods, well over a full rack. I guess I can just hope so…
There's your problem. Ordinary consumer LFF SATA disks go up to 30TB-ish now, though that may not be the most cost-effective size (or it may be, when you consider the cost of the drive bays as well).