Re: If it's easy...
l had the same problem. An information recovery company stated that they have to buy another drive not just with the same make and model but also very close in manufactured date so that it has the same batch of encryption chip. I seems that WD changes the chip contents regularly, so it is difficult to get 2 identical chips.
Personally, I have found the WD encryption to be a giant pain. And there is no way to stop it or turn it off. Your data is always encrypted, even when you don't put in an encryption key.
== Which brings up another problem: A random glitch sent some garbage over the USB line to a WD drive, which it interpreted as me setting the encryption key, so now the whole drive is unreadable because the drive "decrypts" all the the data with a garbage key.
My defense is to no longer buy Western Digital drives.