are you able to see this. it's for a 2012 but I assume everything is the same
Just a moment...
I read from another post the fill plug gasket is 9030115004. I searched that part and found the plug looks to be 9034118059. I am not certain this is correct but it is a start at least.
https://www.toyota-4runner.org/3523403-post23.html where he quotes fill plug gasket