Retro gaming enthusiasts have been creating mini-PCs first starting with industrial computers (386) built for CNC machines, and have recently been getting custom PCBs made like the Pixel x86: https://youtu.be/B8WfiRRvQXo?si=lbDZymYKATkT66pf

You can find some oddball stuff on AliExpress that’s probably made to replace as close as possible 1to1 EOL equipment: https://youtu.be/6bODiZ5bP84?si=GTwF6MOQqm_VLy4s