Which Visio stencils / templates are you using to create your object / process diagrams?

[RodStewart]

I'm not able to find many of the icons that are prevalent in the Blue Prism literature (such as the highlighted ones in the image). Which templates / stencils are you using to create these diagrams? 

[John__Carter]

They were created specially for us many years ago and are images and not Visio stencils.