Until Cisco creates some new visio stencils for our sourcefires these have been working for me. It's a good collection of the Sourcefire stencils in 3D and they work for my visio drawings I use for NPM map backgrounds!
Here's an additional 3D8120 too I found: http://www.ndm.net/sourcefirestore/components/com_virtuemart/shop_image/product/Sourcefire_3D812_4f21bb43b9a49.png
