I ordered three of these cables for my Tripp Lite brand KVM. I didn't realize I needed them until I ordered them (my fault) but I'm glad I did. You could probably just use VGA extension cables and some USB A/B cables, but I've read that a lot of people have problems with video cable shielding. I've used them and had no problems and they've also reduced the clutter on my desk.
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
10 Review
π TRENDnet TK-803R: 8-Port Rack Mount KVM Switch with VGA & USB Connection, USB/PS2 Support, Device Monitoring, Auto Scan - Control 8 Computers/Servers
10 Review
TESmart 1080P 60Hz USB VGA KVM Extender Over Cat5e Cat6 Ethernet Cable - Long Range 984ft/300m (Sender+Receiver)
10 Review
4 Port USB 3.0 Switch Selector - Pubioh KVM Switch for Mouse, Keyboard, Printer, Scanner - 2 in 4 Out Sharing Box with Switch Button and 2 USB 3.0 A to A Cables
11 Review
Computer case AeroCool Cylon black
39 Review
Computer case Deepcool Matrexx 55 black
55 Review
MasterBox Q300L Micro-ATX Tower with Magnetic Dust Filter, Acrylic Side Panel, Adjustable I/O & Ventilated Airflow, in Black
40 Review
Zalman Z3 M ATX π» Tower Computer: A Compact and Powerful Machine
77 Review