Hello again all and Seasons Greetings!

Think I've traced an oil leak to the R/H timing cover.
This a common one? (75K on vehicle. Florida climate).
I've pretty much convinced myself (with the help of an inspection camera) that the valve cover is not the culprit.
No gasket shown on any of the parts diagrams, so assume I need a sealant of some type.
Reasonably straightforward procedure or should I shove some quarters into Topix?

Cheers!
Dave