4K HDMI to SDI Converter, HDMI to SD-SDI HD-SDI 3G-SDI Audio Video Adapter,Support HDCP 2.3,HDCP 2.2 for Camera Home Theater Monitora (with Power Supply) - Newegg.com
3G-SDI HDMI Converter - Convertitori Audio Video - Home Cinema
Blackmagic Design Mini Converter SDI-HDMI 6G – Thomann United States
Amazon.com: HDMI to SDI Converter, Micro Converter One HDMI in Two SDI Output (with Power Supply Adapter, Audio Embedder Support HDMI 1.3, 3G/HD- SDI Auto Format Detection Extender for Camera CCTV : Electronics