My guess is that you won't find that parameter anywhere outside of a special flight test version - certainly that's the case with all our digital Stall Protection Computers - unless it's on a specialized maintenance or set-up bus (unlikely as most modern vanes have alignment fixtures so swapping is straight forward).
If you need it for the FDR, you're already recording Lateral Acceleration (or should be) so it ought to be possible to reconstruct the raw uncompensated AoA - may not meet the original requirement of the FARs/ED-55 but, given the Level A software in the ADIRU, probably defendable as meeting the intent.