I finally broke down and ripped out a 14.1 inch screen from an older craptop. I checked the model number against the list from this seller:
I'm not sure if it can be supplied at different voltages, the Engrish is very vague. But it has input for HDMI, VGA, and DVI, so it could be useful in a number of different projects. I searched for a dedicated HDMI solution for my specific LCD model, but to no avail.
A fourteen inch screen changes my original idea significantly. I originally envisioned a small box with batteries, screen, and a Pi with USB controllers connected. I soon decided on PS1/2 controllers since they are the limit of what the Pi can emulate, as well as being ergonomical and cheap to source. After the failure of the Chinese screen, I started thinking of the drawbacks to that design; mostly that the screen was too small to be utilized by two players, and that they were unreliable in general. I also thought a resolution change might be nice, so I did some research on small HDMI displays. There are options out there, top choices for me would be Adafruit's selection, or a recently funded Kickstarter, HDMIPi.
These were all too expensive for my project budget, so after further research into the problem, I found the LVDS converter. I have many junked laptops, and most of them still have good displays. Now the problem to solve is how to get this all hacked up in a portable package. I think I can find a tackle box with a clear lid to mount the screen on the inside of, facing out. If so, then batteries and Pi can easily fit in the leftover space behind it. Now I just have to figure out if weight is going to be a major issue. I'm an ultralight backpacker, so I have some extra space/weight for electronics that I love. But if I can't get it under 2 or 3 pounds, then it won't be worth it. The space constraint is a little more loose, I now see it with carabiner clips to facilitate strapping to a tree, so it can be clipped outside my backpack.