We don't have one by default. You will need to either create a custom one, or maybe one of the members has one already they can sell/share.
I would maybe try contacting these guys
http://www.airwalltechnicians.com or
http://www.nationalairwall.com to see if they have a CAD block, we can convert it to Visio from there.
I'll update this thread if I find one. Thanks!
Found this drawing of what they are using -
http://www.capitolplazajeffersoncity...iumdiagram.pdf