There is a Brush addon I have never used it so not familiar how good it works if I am not mistaken and I could be totally off on this but Brushes that are not standard with Blender will always need to be added to the the project your working on using the append feature described in the tutorials they are treated like an asset file again I can might be totally off base on my comment I have not gotten to sculpting in Blender in my personal skill level so have not done much investigating or learning on all the features available. Take a look at this Brush Addon it is free and it might offer more of a solution for you than advice I have given so far.

Blender Add-on overview: Brush Manager for Blender ( free or paid )

Again truly hope this helps

Lobo3433

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Forum: Blender

Subject: Sculpting brushes