I see it the same way others do, technically spoken it's time consuming to restore, but possible.
The "chips", there should be 16 x storage chips, also on the front side? Then there some other kind of stuff for
firmware and comunication SATA, etc... which can also be broken, you (restoring person) can check each to know,
where's the fault and do a exchange or renew this parts.

So the company you contact, should IMHO exactly explain how the want to make the repair/restoring, etc...
so you know the conept they want to use.

Bye