Hi MeryCx
welcome to the Apple (user-to-user) Community.
We are all Apple users in this Community, mainly answering user-to user requests one to one. Am no expert on bulk warranty, and do not know who could help with that info., yet your request surely deserves a response.
Wondering what Apple business contact info. you received initially, when acquiring products / purchasing Apple Care for the devices.
Eg: you may be able to contact:
AppleCare Professional - Enterprise Support - Apple
More info:
Apple Care info:
Learn more about hardware warranties.
or
Policies, terms, and conditions for the purchase support, and servicing of your Apple products.
Legal - Sales & Support - Apple
or
Deployment Reference Guide:
Apple Platform Deployment – Apple Support
Else:
See a list of Apple phone numbers around the world to:
Contact Apple for support and service – Apple Support
All the best :-)