Making electrical diagrams... symbol blocks?

Rhino Rhino for Windows
1

Is anyone aware of a resource for 2D blocks with standard symbols for typical electrical components? I need to make some diagrams.

2

I saw this:

http://www.rhino3d.com/resources?id=914

Not sure if that’s what I need but the link is dead.

3

http://wiki.mcneel.com/rhino/modellinks

4

This link should work now.