If there's a TV repair / electronics repair shop in your area -- someone who works with contemporary flatscreens -- I wonder if you could reach out and make the ask? They probably have a sense of which generic controllers they would use.
I don't think anyone repairs these things anymore. I found two dumped in the desert, one with its controller and power supply boards removed and one that was complete.
I got interested in this when the previous poster asked the question. Going down the rabbit hole I think I have my answers. Avnet has some good info on the mipi interface for consumer devices. It's been very interesting and I do see it as a path to building good, cheap, large displays.