So I hit up the local parts store, usually this is NAPA but they close early on Saturday. So off to the next closest one that isn't Autozone. Turns out they have a Dorman (part number 090010) plug on the shelf, at another store though. So off I go and as the guy is ringing it up I noticed the threads were different. You can see it in the picture. Unfortunately, they didn't have just the gasket so I ended up buying the plug for just the gasket, $13. Later one I bought a 25 pack of gaskets for less, online.