I have created some "Modern" style Visio stencil for the following System Center products:

• Virtual Machine Manager
• Data Protection Manager
• Configuration Manager
• Orchestrator

They are based on the modern style stencils from Microsoft available here. 

They were based on stencils from Kevin Greene MVP (http://kevingreeneitblog.blogspot.co.uk/)

Please note they are for Visio 2013.