One place you won't find what you're looking for is in the Pentagon -- the doors you have described are neither water or sound tight, they aren't bullet proof, and are far too inexpensive for government use. Just kidding.

How could we possibly not help you locate what you're looking for after providing us with such a well detailed description. Terrific job Admiral! What you have described in every detail is a "metal-frame wardrobe door". Not as popular on the East Coast as the West, but none the less, readily available.

There are really only two basic types of sliding wardrobe doors -- those which have rollers mounted at the top of the door and those which have the rollers mounted at the bottom of the door.

Typically, we see the lighter weight doors (light-weight aluminum frame with light weight vinyl coated cardboard insert panel) with the rollers mounted above, and the heavier weight doors (heavy-weight aluminum or steel surrounding a mirror or beveled glass) with the rollers mounted below.

The difference is obviously in the weight. The weight of a heavier panel not having support from the bottom (rollers at the top) could literally cause the side and bottom frames to pull apart from the top frame.

Regarding panel removability -- we strongly recommend against the type of frame with brackets on the back to hold the panel in. Part of the structural integrity of such a door is developed by the fit of the panel to the frame. A rubber gasket is used to tightly fit the two together.

Artistic Mirror & Shower Door Co. sells a 4x8 vinyl wardrobe door for $88 that comes in a frame that can be disassembled by removing a retainer clip at each of the four corners of the door -- in our opinion, a much stronger alternative to the back mounted bracket type you are familiar with.

Also, to save money, the panel that comes with the door can be removed, and painted or wallpapered and then replaced into the frame to compliment the decorum of the room where it will be used. A replacement of the panel is also possible if desired.

Large mirror and shower door companies usually supply and install (vinyl or mirrored) wardrobe doors. If a quick jaunt through your local yellow pages leaves you without a number to call try one of these -- Artistic Mirror and Shower Door Company, (314) 567-7777; or try Charmac, Inc., at (310) 638-8506. Both companies are major suppliers of wardrobe doors.