Update: For my most up to date list of VMware and Virtualisation stencils please visit my dedicated page here >> https://virtualisedreality.com/vmware-and-related-visio-stencils/
Can be downloaded from here
http://viops.vmware.com/home/docs/DOC-1514
Update
The above link seems to be down for the moment
In the mean time you can try Xtravirt’s Presentation pack here
http://xtravirt.com/presentation-pack
Or
Veeam’s free stencils here
Virtualised Reality 
cool