Sorry. It's dead. If you were to find such, my bet it would be some used or old inventory.
It's been a decade since Windows ME. It wasn't well received then and never gathered much of a following. I know that you may not like that the world has shut down Pre-Windows 2000 versions but they have.
Good luck in your quest but not a single multi function I saw last week listed Windows prior to XP.
"Why have manufacturers removed older drivers from their downloads?"
That I know the answer to. HP and others didn't write the drivers. They licensed such from other companies and those licenses have expired. Everyone had 5 or more years to download and put the drivers they needed on a CD or such so you could wonder why a person would not do that?
Where might I get one with drivers for Windows ME?
Why have manufacturers removed older drivers from their downloads?