At work we have relatively slim (about 3.5" wide) Dell PC desktop workstations. These are placed vertically (on their sides) on the floor under our desks. They're not very stable, and a coworker knocked his over today (causing it to fail to boot).
I've seen L- or wing-shaped "feet" mounts or stabilizers for other devices - routers, game consoles, etc. Are inexpensive generic ones available for workstations, and if so, where? What are these called? (I've tried several searches.) Alternately, has anyone made their own from off-the-shelf materials?