Yeah people were showing off something very like this on YouTube a week or two ago. And that’s actually the second time I’ve seen these. I think you got scooped bro.
I came here to see if anyone is selling them. I don’t have a printer.
If you read the post, you'll see that OP was inspired by a similar design (which is linked as an embedded YT video) but designed his own to fit his other needs, i.e. making the back part a tray.
Article clearly says that he saw the existing ones and decided to tweak it for his use case? He didn't say he invented and patented it. Weird thing to complain about.