I'm not sure if this is what you wanted, but you can try this:
http://www.fxshare.com/nuke/downloads/gizmos/3d/4276.html
Took me a couple hours to make, but it was fun (and I learned a little tcl regarding how to connect 100 nodes at a time -- it's nice sitting next to Bill sometimes)...
[edit: I changed this from a group to a gizmo now that nuke4.5.27 will handle it properly. Users of earlier versions will have better luck copying the gizmo to a group each time.]