rhinocables® DVI Coupler Female Gender Changer/DVI-I Dual Link Adapter - Connects 2 Cables C3110 : Amazon.co.uk: Computers & Accessories
AudioQuest HDMI Dvi | Adaptor Couplers | Audio Emotion
PNGKNYOCN DVI Female to Female Coupler,DVI 24+5/DVI-I Serial Cable Signal Extender for Extend and Connect two DVI Cables(2-pack): Amazon.co.uk: Computers & Accessories
FSUK High Quality DVI-COUP-ADP DVI Coupler - Female to Female adaptor