Z Cam shows upcoming HDMI to SDI converter - Newsshooter
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
Blackmagic Design Micro Converter Bi-directional SDI/HDMI 3G SDI And HDMI Compact Bidirectional Converter | Full Compass Systems