Answer
All the Standard/Catalog Components are grouped in one place: the SmarTeam Catalog.
You can find it from CATIA:
And also from SmarTeam:
In the case you can't find what you need here, please check the document below with other possibilities.
It's also possible to add your own CATPart/CATProduct as Standard/Catalog Component.
To do this, you have to contact the catalog manager (catia-catalogs@cern.ch).
Category