Can I replace Ethernet PCB on this External HD?

I have a Western Digital MyBook external hard drive that recently quit connecting. This is a NAS device, so direct connection to the hard drive does not work, however, the HD itself is still working and files are intact. The problem is that the Western Digital drives are encrypted, so the only way I can see to recover my data from the hard drive is to find a new PCB with the same numbers and connect it to the hard drive so it can connect to the network and transfer the files.

My question: is this the only approach? Or does someone have another suggestion.

This particular PCB number has been impossible for me to find online, so I am hoping someone has a workaround or resource.

I found a thread that describes using an ExtFS driver to mount the SATA drive directly to the computer - when I try this the drive does show up and I can view and access the folders and files, but the drive dismounts intermittently and file transfer speeds are EXTREMELY slow.

Any input from you guys would be greatly appreciated.

Thanks!

Western Digital MyBook Live NAS

PCB Model#: 4061-705086-003Rev. AE