Amazon.com: Cmple - HDMI Female to HDMI Female Adapter Gold Plated, High Speed HDMI Coupler F/F Female to Female Adapter Cable Extender, 4K UHD and 3D Support - HDMI to HDMI Joiner
HDMI to HDMI Adapter Female to Female - Video Cable Adapters | StarTech.com
HDMI Panel-Mount Coupler F/F -- DataPro
Adventures in Splicing an HDMI Cable | Killerspaz's Blog
Monoprice HDMI Coupler (Female to Female), 90-Degree - Monoprice.com
Tripp Lite 1ft HDMI Coupler Keystone Panel Mount Angled F/F Black 1' - HDMI cable with Ethernet - 1 ft - P164-001-KPA-BK - Audio & Video Cables - CDW.com
Amazon.com: Amazon Basics HDMI Female to Female Coupler Adapter (2 Pack), 29 x 22mm, Black : Electronics