It looks like the OpenPleb initiative, a joint effort from Level1Techs and Gamers Nexus to get manufacturers to be more open with their protocol and interface documentation, is working! Case vendor HYTE seems interested and said they’re willing to send me some sample devices along with protocol documentation!
This is the first manufacturer I’ve seen comment on the OpenPleb initiative publicly.
Got a response. They are working on preparing the documents and they will be public. They were interested in my video idea. They absolutely sound on board with the project and asked for my address to send me samples!