I needed a portable monitor that I could take on an airplane so I took a long shot and bought a $79 19" LCD TV at Best Buy. Was amazed it worked with the Mimeo and an original Apple-1. It fits in my old 17" laptop bag from the early 2000's. All I did was set the video pot to the middle and then adjusted it once video was displayed on the screen. The best part, it's light and the power supply is built in.
I know finding a cheap LCD that works with the A-1 is pretty much impossible, so I figured I'd share.