Those are probably going to be hard to find for a consumer though especially outside of the states. Lot of stuff geared at industrial/commercial use does not tend to be easily available in regular stores or websites.
True but this as you stated and right, are not equipments tailored to be sold to the common end consumer who wants to hook up a HDMI box and watch Netflix or have a Plex Streaming Server at home.
This are equipments suited for companies to be used in video walls for monitoring and for commerce Ad showing. And it interests to people like us, EE and ITs who have different needs. And most of us work in companies who had a sales department and for sure can try if you want to own one to the manufacture to sell one as a test with the chance to buy more in the future if it fulfils the need. That's how I bought most of the test equipment I own and also IT equipment, just calling out companies in name of the company I worked in the moment (of course with the authorization from the higher ups) or asking the sale department "friend" to ask for quotation in the resellers and manufactures who worked with.
That way you can get sometimes a healthy discount and even some times they provide with samples for you to test and if it's what you need you just need to ask how much will cost you to keep it, and normally that includes a minimum of 10% discount. My 289 was bought that way, my Zenbook was bought that way, my old workstation parts were bought with 20% discount on the final price because it was a reseller/distributor we worked a lot and had an account with for years...
If you really want one, and don't have the problem to pay a little more that the normal run of the mill TV sold on Walmart, you will find a way.