Screen to use for night vision monocular?

Hello, I'm working on making a night vision monocular according to the tutorial at http://www.lucidscience.com/pro-night%20vision%20viewer-1.aspx but the viewfinder in the camcorder I got doesn't work. So I was wondering if anyone knew of a cheap (<$25) screen that I could display the output of a camera on. 
I'm open to all suggestions! 
Thanks a ton.

there is more than that but that is a good option