There have been many occasions when I've wanted to find a CB. On various Boeings I've re-stored systems and avoided problems via a CB re-set. Some QRH's call for pulling CB's. Many yonks ago I flew with an operator who had a CB 'map chart' in the tech-log. There is also one in Bill B's & others Boeing reference books.
I then flew for various young growing operators and asked them to include such a 'map chart' in their tech log. Sadly it never happened. It would certainly avoid much wasted time when identifying a CB was required.