DVI splitter adapter cable (2x DVI female - 1x DVI male)
StarTech.com VHDCI to Quad DVI Splitter Breakout Cable - VHDCI (M) to 4x DVI-D (F) - Connect 4 DVI-D displays to your VHDCI video card - DVI Cable - VHDCI Graphics Card
StarTech.com USB 3.0 to DVI Adapter with 1 Port USB Hub - 1920x1200 - External Video & Graphics Card - Dual Monitor Display Adapter - Supports Windows (USB32DVIEH)
Monoprice CPU Cord Splitter,DVI-D M/(2)DVI-D F (2518) | Zoro
Wyse Compatible DVI I Splitter DVI D to VGA Adapter V Series
USB 3.0 Hub MultiPort Adapter - DVI, HDMI and GigaBit Ethernet - Monoprice | eBay
8in Wyse DVI Splitter Cable - DVI Cables | StarTech.com
DMS-59 to DVI Splitter Cable Connector for Dual Monitor Setups or as a DVI Adapter Y Cord Dongle-10inch - Walmart.com
StarTech.com 4 Port Dual DVI USB KVM Switch w/ Audio & USB Hub - Share a keyboard, mouse and dual DVI displays/monitors between 4 multimedia computers - Dual Monitor KVM - dual
Dvi-d Male to Dual 2 Dvi-i Female Video Y Splitter Cable Adapter for sale online | eBay