How to get values for performance statistics such as draw calls & triangles?

I would like to be able to get the number of draw calls (STAT_MeshDrawCalls) and triangles drawn (STAT_RHITriangles) and show those in a custom UI - not the built-in UE4 debug stats overlay.

How do I read the values of STAT_MeshDrawCalls and STAT_RHITriangles?

I’m interested in this as well: if I will find a solution I’ll update this post!