I recently acquired an old Lancom network switch, practically new in box. It came with everything, except the rack mount brackets. But hey...what's a 3D printer for, right? 

So I made myself a bracket that fits. The overall dimensions follow the standard for any rack mount hardware, so there should not be any issues. These brackets mount on any full-width 19" device with four mounting holes on its side. The four mounting holes on this model are spaced 14.7mm apart from each other in a square pattern. The brackets are mounted with M3x8 countersunk screws.