And all of you need to see the cursed thing I have created the moment I pried it out of the game files.

Thanks to Hunman for quickly writing up a semi-destructive script for quickly datamining new files and my friend supplying me with booze.
Turns out that M2 files have their .skin IDs in the SFID chunk and actually point to the specific File IDs. The job went far easier because Blizz was lazy and replaced the old model with a new one instead using the _HD suffix.