Are you searching the internet for this and you can't find it? If so, it could be because HDMI uses HDMI connectors, 19 wires, bla bla bla. HDMI is one means of getting an HD video signal from one place to another and you're trying to get an HD video signal from one place to another without wires. So you're not looking for an HDMI product. You're looking for a product with HDMI inputs and outputs.

Try searching for RF HD solutions. That's what the HD Flow is; note that it's not HDMI Flow. I used an HD Flow once about two years ago but it only worked about forty feet through one wall tha was only drywall and wood studs.