Selfsame as in "the very same":
Here is the Wall Street Journal:
And that frustration must surely give way to hair-pulling apoplexy when those selfsame politicians helpfully suggest that central banks stop sitting on their printing presses and embark on the latest cruise ship-designated round of stimulus to help them out.
From an article published in The Wall Street Journal on August 16, 2011
It is still used in formal or journalistic or even literary writing.
Those selfsame politicians have been laboring long and hard in the basement of the capital building to come up with a plan to replace Obamacare.
in a blog published on March 8, 2017
I chose the word politicians as the term is easy to find associated with them.
And you can go to ludwig.guru and search for "those selfsame" and you will find many others in newspapers such as the New York Times and The Guardian:
One of the more baffling parts of the recent Viacom versus YouTube court revelations was the astonishing finding that executives from MTV and pals were ordering YouTube to take down videos that infringed its copyright - while their minions were simultaneously uploading those selfsame copies.
From an article published in The Guardian on March 30, 2010