RAID Recovery after Firmware issue

I'm curious about the initial P2000 problem that prompted this. Which P2000 model/generation/interconnect do you have?

I'd probably accept this as a loss...

While the data may still be on disk, you need to reconstruct the array. A good data recovery firm should be able to reassemble this and may have access to the necessary hardware resources.

With the P2000, like Smart Arrays, the RAID data is on disk. But you've cleared the RAID configuration. So I'm not sure what other options you have.