My experience of buying 20k disks at a time is that even those volumes aren't significant to the manufacturers. So essentially you are asking the distributor to

My experience of buying 20k disks at a time is that even those volumes aren't significant to the manufacturers. So essentially you are asking the distributor to label them. Given that you have multiple vendors and you also seem to have a risk even in handling any drive, I would suggest that asset tagging the disks and using a bluetooth scanner, or android data entry app, would make sense for all your disk assets. You can then automatically document and track the entire lifecycle of a disk live, as it is inserted or removed. Your refusal to generate your own labels seems strange.