Originally Posted by ZIPPY
These are nice:

https://www.dormanproducts.com/p-19490-090-058.aspx

Alternately we can also take a cue from German car service and add a copper crush washer to the existing plug.

All the early, pre 1965 maybe, Mopar oil pan drain plugs had a copper composition washer with some type of white colored (maybe asbestos) material wrapped inside the washer on them scope

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)