If it’s using the UID, there aren’t any super easy tags you could get to clone these to
If you use the “read memory” option on NFC Tools, or something like NXP’s TagInfo, you might be able to find other data used for this which might be clonable to another tag
Or you could get a tool to emulate the tags one at a time without cloning them to new tags at all
Lastly, this sounds like a bad a idea to me and you should probably just continue to make your rounds like your job wants