Micro Converter BiDirectional SDI/HDMI - No Trouble®
Amazon.com : Blackmagic Design HDMI to SDI Micro Converter, Without Power Supply : Electronics
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