Man you guys are useless, I had to figure it out all on my own. You really need to stop referring to yourselves as internet autists.
The proper size o-ring is 20mm OD, 14mm ID, 3mm thick.
https://www.amazon.com/dp/B08HJMQZHS?tag=wranglerorg-20
The one PSC used looks about 2mm thick. Here's a picture of the difference.
Still leak free? I am about to try this ring on my 2004.