In order to use this you'll need to extract the .zip into YOURWOWFOLDER\_retail_\Interface
NOTE: There is a strange grey artifact around some borders that i can't gear around, might be something related to the conversion process from .png to .blp, if anyone knows how to get around it i would be grateful.
After extracting you'll need to relaunch the game. And it will look like this:

After seeing this post on reddit https://old.reddit.com/r/WowUI/comments ... to_the_ui/ that led me to this post here on the forums viewtopic.php?f=11&t=13005&p=46250
I went and downloaded the Glues Restored (https://www.tukui.org/addons.php?id=115) to look into the files and see if something could be done.
Then I've somewhat got it to work, did a few simple edits.
If anyone has more experience with the inner workings (the .blp) maybe I can get the other icons to work too
Do note I am not even remotely a graphic designer, just someone who looked into the original files.