Turns out in other parts of the world reverse engineering of the Leaf battery progressed much further than in the US, unless the once who did it here are keeping it to themselves. People hacked into BMS firmware and can freely change stored AHR values and restore the display to 12 bars. They can also pair BMS with the Leaf. All this w/o using Consult III. Unfortunately they don't want to share the details, but I tend to believe they are telling the truth. Not clear if a pack disassembly is required to grab the BMS firmware image from the flash or you can do it over ODB2, but once it is done I suspect you just spend a lot of time with a hex editor looking for the offsets where the ID, AHr, and the checksum are stored, write the new values, and flash it back.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
54.94AHr, SOH 86%, 130k miles9kW Solar