If you just want a bigger screen and not too worried about HD resolution, I use one of these 10" fpv monitors 10.1" Lumenier LCD Monitor - LED Backlit
I bought it for flying analog fpv, it works great and does have an hdmi input. Screen resolution is 1024x600. I have verified that it does work with the ST16 controller.
If you're looking for higher resolution, do a search for 10 inch HDMI monitors and check for at least 1280x720 screen resolution.