Create stencil from folder of PDFs, vectors or image files?

I was wondering if there is any way to create a stencil from a folder of vector items? In particular, I was hoping to create a stencil from font-awesome svgs.

From what I can tell, as one can’t copy/paste from illustrator, so I could imagine batch converting them to PDF. However, opening multiple files opens them in separate documents/windows.

Would there be any way to create a stencil from a folder of these icons converted to PDF?