The playermodel must be changed. I will list the reasons:
1. This Custom Job has been reported before for the same reason, and the playermodel was supposed to be already changed. I'm not sure quite what happened there, but it was already supposed to be changed.
2. Even if this job had this specific model before research, the suits and robbers pack has been used on High Command/Site Admin quite literally since the release of the server, and therefore the argument that D-Class had it first is invalid.
3. I did not personally look through all of the jobs being auctioned, and if I had realize that this job had this playermodel on it, it would have been changed before the auction. That is a mistake on my behalf.
I will reach out to the CC owner to discuss the matter further with him, but that is the end of this.