Mr. Bill,
The case is from Silicon Ray -
http://www.siliconray.com/mechanical/enclosures/re4310w-430x100x330-aluminum-enclosure.html
It was on sale for $150, down from $185 when I bought it.
A couple of caveats - The front and back panels (as well as the sides) are 8mm thick aluminum, so the mounting of the miniature toggle and RCA female chassis connectors required milling out the back to lessen the thickness. This wasn't required for the standard size toggle switch on the front or the binding posts, IEC inlet, or XLR input.
The necessity of the 2 3pdt locking miniature switches on the back is specific to my need to switch between XLR and RCA inputs on the fly. One pole of the on-off-on switch is used to lift the ground of Nampon, and the other 2 for switching between XLR and RCA inputs.
A more rational build would simply use XLR connectors, and forego the Nampon switching which would eliminate the need for machining the inside of the panel. An on-off ac power switch allows the switching of external cables and cords.
FWIW,
Paul
PS - I've found 3 brass cones to be quite effective vibration control, subjectively. They're, IMO, for this build, preferable to Black Diamond Racing (BDR) cones as well as Stillpoints. YMMV