19-inch ATX rack-mount 3U server case - IPC-C330 - 30cm depth
Amazon.com: RackChoice 3u Short Depth rackmount Server Chassis Micro ATX/Mini-itx 2x5.25+5x3.5 Bays Support Standard ATX PSU with Either top or Side Cooling : Electronics
3U Rackmount Case, only 15.7'' deep from The Book PC
IPC 3U-30240 - Inter-Tech Elektronik Handels GmbH
3U Quiet, MicroATX Chassis - General Technics
IPC 3U 3098-S - Inter-Tech Elektronik Handels GmbH
Amazon.com: 3U Server Chassis - Compact 12" Deep 19" Rackmount ATX Computer Case (Back or Front Rack Mount for Easy Access to Rear Components & Ports) 4 Bay 1x5.25 3x3.5; 4X Full