A seller on Amazon has the grips for the EMP mostly in G10 and a lot of them come with the proper screws.
I have a couple sets myself and the quality is every bit as good as VZ.
The EMP with the thin panels already have the short bushings so there is not a need to change.
Etsy is an online small shop marketplace. It’s well established and has a lot of variety. It tends towards the artistic side of things so grips but not slides and parts etc.