Thanks ExDilbert and dm_4u.
The Monoprice Blackbird looks like it would do the Job. I have considered using a 4k home theatre receiver but the one I have upstairs connected to my Panasonic 3d tv is a few years old (pioneer Elite VSX-70) and even though it has 4k pass through I'm guessing there may be some video loss.
My 4k lg oled tv is in the basement and for best video signal I have the apple tv 4k, xbox one s, bell fibe box connected direct to tv and use toslink cable to budget Pioneer VSX-821 for audio. The 4th lg hdmi input is now connected with the upstairs Pioneer Elite home theatre receiver's 2nd hdmi output with a hdmi cable about 20ft long but I notice sparkles sometimes when using it to view content from upstairs sources (Roku, other tv box, etc).