I still haven’t invested in a spectrophotometre such as an X-Rite i1pro 2 to do my own measurements and possibly share them.
So this thread is still open:
Also see spectrophotometer: I want to measure my colorchecker
I basically have the same problem as you: I’d love to have spectral data for both pages of the colorchecker passport version 2, after 2014.
Not sure I caught your drift, though: what did you end up doing, @Grant_Robertson ?