Metal-Muffin
Space Marshal
Those are the cheapest that I've seen, but the view area behind the MFD's is only 4x4", so there's a lot of wasted realist ate on the screen, which I'm having a hard time justifying financially at this point. Maybe later down the road.I've been thinking about using these 8" screens and these USB to VGA adapters then just putting my own buttons around. It will have to wait till I have an income though. You could totally use these screens with those cougar panels.
Regarding using USB to VGA adapters, I have read that those eat a lot of your CPU, which In my case, I need all the CPU I can get. I do, however, have an old GTX580 that I'm using to run the 2 smaller displays (and physics) while my 970 handles the games.