Heya @deviantollam - because you asked recently and we already mentioned digital signage displays .... The Antilinus .. erm Linus Sebastian and his LTT channel made a video about that topic. ;)

youtube.com/watch?v=LJh72_O4pX…
redirect.invidious.io/watch?v=…

And it seems he found a single vendor (in canada) still selling "dumb displays" for a pretty good price .. at least this one (800$ .. not specified if US or CAD ;))

Have Fun and good luck ... pls keep us updated! ;)

.oO( P.s.: I call him the antilinus for fun ... because he seems to be able to break linux installs by just being near them. ;))