|"I know there are programs to recover data from a broken RAID".|
That statement is wrong. There is NO way to recover because all the data is not on the remaining drive.
Unfortunately someone convinced you to use RAID 0.
Why in the world did you also encrypt? You are a glutton for punishment.
I don't think a recovery company could recover your files if they had both drives in their possession because of the encryption. You wouldn't want to pay the bill anyway.
Hard lesson learned. Backup, backup, backup. While you are at it, don't run RAID 0.
The ONLY chance you might have is if the printed circuit board on the drive is what has died and not the mechanical end. If that is case you MIGHT be able to replace the PCB. That would require an exact replacement part, not just from the same model hard drive.
Does the drive rotate?
Does it show in the BISO?