SUPREM.IO but I made it 100x harder with Mods!
I basically used Inspect Element and the Chrome Extension called Asset Swapper, and it was a fairly simple process. If you're interested in a tutorial, please let me know in the comments.
Asset Swapper: https://chrome.google.com/webstore/de...
Inspect Element: [CTRL+ SHIFT + I] - Windows
[CMD + OPT + I] - Mac OS
Hope this helps, and have fun!