This Veto tool-bag, as reviewed on Kevin Kelly's Cool Tools list, sounds like just the thing I've been looking for:
The Veto just feels right in your hand or over your shoulder. The quality of construction is simply amazing. A molded polypropylene tray forms the bottom, the sides are 1800 denier nylon which is doubled up in many places and secured with double stitching. The bottom and handle are attached with rows of rivets, and the the zippers are massive. The large handle is attached directly to the center divider so that all the weight is carried by the center divider and end panels. There is no weight carried by the side panels and zippers. The bag comes with a wide padded shoulder strap attached with rugged metal swivels. The Veto bag is divided into two identical half's. I keep my tools in one side and my electrical meters and plumbing hookup parts in the other. I like that this bag completely zippers closed. I don't like the new trend for bags that are covered with external pockets, I want to know my tools are safe and secure.
(via Kevin Kelly's Cool Tools)