@SecurityWriter I've purchased such displays from a Chinese direct-order website before: buydisplay.com
The site looks a little slipshod and shifty, but they have reasonable prices and delivered exactly what was promised. Just expect slow-boat-from-China shipping speeds.
I got a 7" HDMI LCD touchscreen from them a while back for $43. Worked great.
@SecurityWriter Granted, worth noting these are a little bit DIY in that they usually don't ship with frames, so you need to mount them in something yourself.