Hi @griff777 ,
What screen has the crack in it, the digitizer (touchscreen) or the LCD screen?
Here’s a link to a [https://www.youtube.com/watch?v=8gsSkJ8_qo8|video] that shows how to replace the digitizer in a Nextbook Ares 8A tablet. You could use it to replace the LCD screen as well if that was the problem.
Just search online for ''Nextbook Ares 8A touchscreen'' (or ''LCD screen'' if applicable) to find suppliers of the part.