Hi David,
Actually, no one can confirm or provide any BitLocker recovery keys because they are confidential and unique to each system. So if you’re trying to recover a BitLocker key, the correct path is to log into the Microsoft account associated with the device at https://account.microsoft.com/devices, or check with your organization’s IT administrator if the machine is domain‑joined.
I know it's painful, but without access to those official sources, there’s no way to regenerate or “force” a valid key. I hope you can recover it soon.
Harry.