The link on the first page is no good; however, if you did a little bit of reading like 2 or so pages back Jaerin posted the recent working source, which i will relink for like the 3-5th time within the last 3 or so pages.
https://github.com/Jaerin/PoeHud
@shlomoe if you open up the ItemAlerter.cs file and search for this line
rc.AddFrame(rect, Color.Red, 1);
edit the 1 to 2, it will make the border a bit thicker, but i wouldn't go more than 3 because it will start to overlap with some of the item alert icons, like rgb, 6s, etc.
Perhaps someone could add in an option in the menu to set the border thickness as well.