I designed it myself.
Altium never has the part you want!
Maybe a dozen manufacturers libraries are massively comprehensive, all with 3D models and supplier data etc. But then the others that haven't been touched and updated since the new push toward all this live vault content, and they contain very little or nothing.
There are some libraries that only contain one part from a manufacturer! That stems from the internal designers (like me) needing the part for a Nanoboard or whatever and then having to create the library for that one part, and it eventually made it's way into the public libraries.
The majority of the major parts in the various power supplies I've had to design myself.
Dave.