I hate to put the nail in the coffin on this one... Happened to come across someone who had been working on this in-game on a disposable account. They had it working, until they changed areas, IE load to different area/zone change where they were promptly disconnected and then could not log back in. Said accounts were closed and after several attempts their connecting IP was flagged and had a softban from that IP.
TL: DR of the conversation with them is A.Net is very agaisnt modding in a more hardliner response and keeps an eye on such things far more actively on anything that could potentially infringe gem sales.
Granted free to try and they didn't denote their methods for discussion over a private convo in-game, just be wary of the very high risk involved and not to test on anything other than a throw away account with an unrelated info to any of your other accounts. Said convo took place when I jumped in during the Halloween event, from a regular player that gave up around 3-4 months prior.
I do appreciate all who tried, seems a lost cause, shame given this has been a beautiful game with a large amount of cosmetic freedom on aesthetic as a whole, compared to other games.