Need a functioning Windows 10 driver for the Epson WF 3540
I'm getting really saturated and totally fed up with the nonsense out there.

Client has an Epson WT"F" 3540 Printer and needs to print i.e. envelopes fed through the rear paper feed.
Windows 10 "universal" drivers are so decrepit minimalist that he cannot choose paper cartridge or rear paper feed.
You actually have to take the paper out and put the envelopes in!
Of course that would be too good if it worked!
So they jam to a point where you have to practically disassembled the printer...
DUH...

Client said he cannot find "drivers that work" At the Epson website.

After going through several trials myself and the irrelevant mindless and misleading Merry-go-round "support" blah blah, I finally succeeded but not without having to turn off security software (!!!). I finally was able to download from the "Epson website". Talk about "security" obsession!

But, all the downloaded files are corrupt! Tried it my own computer, same thing. Tried it on my laptop, same thing.
Any other downloaded file from anywhere else has no issue. Only at the Epson website there is this corruption issue.

Obviously they have become what their printers are...

Other sites I scoured for drivers want to first install their crapware and then modified drivers...

So what to do?
Where can I find a functioning FULL copy of the Epson Windows 10-64 print drivers for the Epson WF3540?