Cheap EVF from Portkeys but is it any good? - YouTube
Kinotehnik LCDVFECON Kit with Electronic Viewfinder & LCDVFECON
Official Zacuto Kameleon Pro EVF for Mirrorless and DSLR Camera - 1080p60 DCI HDMI & SDI Input , Waveform, Vectorscope, Histogram With 3D LUTS & Patented Anti Fog, Anti Reflective & Anti